Tag Archives: Fall migration

October walks at state park will offer migrant-viewing opportunities

The autumn season is a great time to practice birdwatching skills. The temperatures are milder, some of the concealing leaves have dropped from the trees and many migrating birds are moving through the region. With those factors in mind, the Lee and Lois Herndon Chapter of Tennessee Ornithological Society, also known as the Elizabethton Bird Club, will conduct morning bird walks every Saturday in October at Sycamore Shoals State Historic Park in Elizabethton, Tennessee.

 

The walks will begin at 8 a.m. and participants are asked to meet in the parking lot in front of the park’s visitors center. The dates for this year’s walks are Oct. 7, Oct. 14, Oct. 21 and Oct. 28.

Participants are advised to bring binoculars to increase viewing enjoyment. Persons of any skill level are invited to take part in these walks along the park’s walking trails, which offer river, field and woodland habitats. Members of the Elizabethton Bird Club will happily answer questions and help new birders with identification of any birds encountered. Targeted species will include migrants such as warblers, tanagers, thrushes and flycatchers, as well as resident songbirds ranging from Northern cardinals and blue jays to Carolina chickadees and red-bellied woodpeckers.

 

I enjoy fall birding probably more than any other season. It’s always nice to welcome some of our favorites when they return in the spring, but autumn’s the most productive season (at least in my own experience) when it comes to seeing the greatest diversity of birds in a relatively brief period of time.
Birding in my yard during September produced sightings of several species of warblers, a family of birds that is always one of the anticipated highlights of the migration season. Migrants spotted in my yard this fall have included American redstart, Blackburnian warbler, Cape May warbler, Tennessee warbler, Northern parula, magnolia warbler, hooded warbler, black-and-white warbler, chestnut-sided warbler, black-throated blue warbler, black-throated green warbler and Northern waterthrush.

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Photo by Bryan Stevens • Warblers, like this bay-breasted warbler, are experts at remaining hidden in the leaves of trees. Their energetic movements make warblers difficult to follow through binoculars. In addition, bay-breasted warblers are among those species described as “confusing fall warblers,” because their autumn appearance is a dramatic departure from the look they had in the spring.

 

The warblers are the warmth-chasing retirees of the bird world. Like their human counterparts with summer homes in the mountains to escape the worst of summer’s scorching temperatures, warblers retreat southward every fall, spreading into the southern United States, the Caribbean, and Central and South America for the winter months.

 

Of course, warblers are not the only neotropical birds to employ this technique of nesting and raising young in the northern latitudes during the summer only to return south for the winter. Tanagers, vireos, flycatchers and some other families do the same, but not with the same niche-exploiting diversity of the warblers. As a family, the warblers boast 114 species. Not quite half of the species make some part of North America their summer home, which leaves the rest of the more sedentary family members living year-round in the American tropics.

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Photo by Bryan Stevens • An Eastern Wood-Pewee perches during a migration stop in the yard.

 

Warblers pose a worthy challenge for birders. It takes practice to chase their movements in binoculars as they flit among the upper branches of tall trees. They are, for the most part, a family of almost frantically active birds that rarely pause for long while foraging for food, which mostly consists of various insects or insect larvae. Warblers migrating through the region during the autumn season bring another challenge to the table. Many warblers wear completely different plumages in spring and fall, which requires some mental adjustments when trying to match a binoculars view of a warbler to its illustration in a field guide. Known as the “confusing fall warblers,” these tricky cases prompt some novice birders to throw up their arms in defeat. I know because I once felt like that myself. As with all worthwhile pursuits, practice makes perfect.

 

Come out and join me and other bird club members at one of the Saturday strolls at Sycamore Shoals State Historic Park, which is located at 1651 W. Elk Ave., Elizabethton, Tennessee. We’ll chase some warblers through the treetops. We may not identify every single one, but we’ll have a fun time in the attempt.

 

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Bryan Stevens lives near Roan Mountain, Tennessee. To ask a question, make a comment or share a sighting, email him at ahoodedwarbler@aol.com.

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Upcoming programs offer insight into birds and birding

Fall migration has begun. The pace may be a trickle at present, but the floodgates will open in September and October as a multitude of neotropical migrants — birds that spend the summer nesting season in North America — make their way back to warmer territory in Central and South America.

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Photo by Bryan Stevens • Upcoming programs in the region will focus on topics such as songbirds, raptors and the basics of beginning birdwatching. Plan to attend one or more of the programs to learn more about birds, such as this green heron.

A few of the “early birds” are already well on their way. At home, I am already seeing evidence of the increasing pace of migration as hummingbird numbers increase daily at my feeders and thrushes and warblers make stopovers in the surrounding woodlands. In the coming weeks, I fully expect to see even more of these migrating birds. It’s one of the major reasons that autumn’s my favorite season. The birds that were in such a rush to get to nesting grounds back in April and May take a more leisurely pace as they journey back south in September and October.

September will also offer some opportunities to learn more about our feathered friends at some upcoming programs that aim to provide some unique insights into the birds that share the world with us. Consider attending some or all of these events, and then be sure to get outdoors in the next couple of months to discover the diversity of the birds that pass through the region every fall.

I will be presenting a free program titled “Bold Birding in the Backyard and Beyond” at the Elizabethton/Carter County Public Library at 1 p.m. on Wednesday, Sept. 6. The program, which is part of the library’s Adult Services program, is designed as an introduction for beginners to the pastimes of birding and birdwatching.

 
My presentation will feature photographs taken around my home, as well as from some of my birding adventures during my travels. I took many of the photographs that will be presented in Tennessee, Virginia and North Carolina, but I will also show some photos from trips to Utah, Georgia, South Carolina and Florida.

 
I will offer some basic steps people can take to increase their enjoyment of the experience of birdwatching. I will also highlight the opportunities and advantages that membership in a local birding organization can bring.

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Photo by Bryan Stevens • Tufted titmouse checks out a feeder.

 

The library will provide light refreshments and a display of books on birds and birding that are available through the library’s collection. The library is located at 201 N. Sycamore St., Elizabethton. For more information, call 547-6360.

The annual Roan Mountain Fall Naturalists Rally brings together nature enthusiasts from throughout the region and beyond for a weekend of nature programs, walks and other activities. This year’s rally — the 55th consecutive one in the event’s history — will be held Friday-Sunday, Sept. 8-10. Most activities will be based at the Roan Mountain State Park Conference Center in Roan Mountain, Tennessee.

While the focus of the annual rally is always on a wide range of topics in the natural world, this year’s two evening programs on Friday and Saturday will put the spotlight on birds.

Dr. Andy Jones has worked at the Cleveland Museum of Natural History for more than a decade. He was hired in 2006 as the William A. and Nancy R. Klamm Endowed Chair of Ornithology, thanks to a donation from the Klamms to the museum. In 2011, he was also named Director of Science, overseeing all activities in the Collections and Research Division. A native of Kingsport, Tennessee, he has ties to several members in area birding organizations, including the Bristol Bird Club. His program, titled, “Using Sequences, Songs, and Serendipity to Understand Eastern North American Birds,” will explore birds and their songs, which are more complicated than anyone expected.

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Photo Courtesy of FORM • Dr. Andy Jones holds a Northern saw-whet owl.

Ranger Marty Silver has worked as an environmental educator and conservation officer for Tennessee State Parks for more than 38 years, most of that time at Warriors Path State Park in Kingsport. He is responsible for the park’s interpretive programming, resource protection, trail maintenance, habitat management and outdoor education. Silver works with people of all ages, especially school children, and shares nature discovery and conservation awareness with more than 30,000 students each year. In addition, he has presented numerous teacher training workshops and has received a number of state-wide and national environmental education awards.

Silver will bring some rehabilitated captive raptors that he employs in educational programs. These birds suffered injuries in the past that made it impossible to return them to the wild, but they now serve as feathered ambassadors to help people learn about a family of birds that is often misunderstood. These raptors (with a little help from Ranger Silver) share new insights into how everyone can play a role in resource protection through nature education.

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Photo Courtesy of FORM • Marty Silver and a great horned owl present an educational program on birds.

Both evening programs begin at 7:30 p.m. and follow buffet meals that will be held at 6:30 p.m. There is an additional cost to attend the meals, and reservations are necessary. There are registration fees to attend any of the activities, including the evening programs, at the Roan Mountain Fall Naturalists Rally. Membership in the organization will result in fees being waived. For information on joining Friends of Roan Mountain or a complete schedule for this year’s Rally, please visit http://www.friendsofroanmtn.org for a downloadable brochure, registration form and contact information. In addition to the evening programs, the three-day rally will feature bird walks, as well as hikes featuring a variety of topics, including butterflies, mushrooms, wildflowers, salamanders and spiders.

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Attending these programs could offer some helpful information to prepare for this year’s fall migration. However, even if you’re unable to fit any of the programs into your schedule, plan on getting outdoors this fall. Birds are going to be much easier to find and observe as they migrate, so keep your eyes open.
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If you have a question, wish to make a comment or share a sighting, email ahoodedwarbler@aol.com.

Hummingbird numbers spike as summer season advances toward autumn

 

From the shade of my front porch, I watched about a half dozen ruby-throated hummingbirds cavort among the blooms of a large mimosa tree on a recent evening. The tree apparently holds an extraordinary attraction for the hummingbirds, as well as the pipevine swallowtail butterflies and other pollinating insects. I enjoyed watching the greenish hummingbirds zip among the profusion of pink mimosa blossoms, which have always reminded me of the thin fiber-optic filaments popular on some artificial Christmas trees and other decorations during the holidays. To draw so many different insects, as well as hummingbirds, the mimosa blooms must provide a rich source of nectar.

While I have almost wilted from the recent extended heat wave, the ruby-throated hummingbirds at my home appear to have downright thrived during these sunny, hot days of mid-summer. Once again, these tiny birds must have enjoyed a successful nesting season, based on the numbers of young hummers visiting both my feeders and flowers. The uptick in the presence of hummingbirds took place without much fanfare, but after a couple of months of “hummer doldrums,” it was impossible for any observer to miss the way these tiny birds have become much more prevalent in recent weeks.

Coinciding with this resurgence of the hummingbirds at my home, I received a post on Facebook from Philip Laws, a resident of Limestone Cove. Apparently, Philip, too, has noticed that hummingbird numbers are on the rise.

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Photo by Bryan Stevens • A male ruby-throated hummingbird perches near a feeder that he is ready to defend from all comers.

“Seemed like a slow hummingbird summer,” he wrote. “But two days ago the babies started hitting the feeders and everything looks much brighter!”

I also enjoyed a recent phone conversation with Erwin resident Don Dutton, who wanted to know why hummingbirds have been scarce around his home this summer. I’ve noticed fewer hummers at my own home this summer, but it’s natural for numbers to fluctuate from year to year. I anticipate that numbers will rise as hummingbirds begin migrating south again in the coming weeks. At that time, the adult hummers will be joined by the young birds from this season’s successful nesting attempts.
Don shared that when he lived out west, he often visited Mount Charleston near Las Vegas, Nevada, where he saw swarms of hummingbirds comprised of various different species. In the eastern United States, the only nesting species is the Ruby-throated Hummingbird.

For readers who have felt slighted by hummers so far this season, perhaps it’s time to try your luck again at attracting them. The surest method is to keep a sugar water feeder available to attract them on their way south later this summer and into the fall. A visit to a plant nursery can also provide an abundance of blooms to use to lure hummers to your gardens. Some late-blooming summer flowers attractive to hummingbirds include canna, cardinal flower, gladiola and crocosmia. While the widely held belief is that hummingbirds prefer red blooms, they will gladly visit any flower that rewards them with a sip of nectar.501-7006-blk

Late summer and early fall, even more so than spring, are usually the best times to enjoy hummingbirds, when they are usually at their most common. There are a couple of reasons for this annual increase. First, nesting female hummingbirds have reared their young, which then begin visiting feeders and gardens to compete with their elders at flower blossoms and sugar water feeders. Second, adult males and females that migrated farther north usually begin swinging southward again in late July and early August.

According to the website hummingbirds.net, mature male hummingbirds usually follow an earlier departure date than adult females and immature birds. The organizers of the website theorize that by leaving early in the fall, the adult male hummingbirds free up resources for their developing offspring. After all, it’s the least they can do since adult male hummingbirds play absolutely no role in helping females with the process of nesting and rearing young. All young hummingbirds are, in effect, raised by single mothers.

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Photo by Bryan Stevens • A male ruby-throated hummingbird perches at a feeder for a sip of sugar water.

Despite their tiny size, hummingbirds are tough birds. One species, the rufous hummingbird, ranges as far north as Alaska. Several tropical species have adapted to the frigid conditions that occur at the higher elevations of the Andes Mountains.

As I have done in years past, I advise a patient but proactive approach for attracting hummingbirds. Keep feeders readily available. If possible, offer flowers, too. Don’t keep your landscape too tidy. A perfectly manicured lawn is like a desert for hummingbirds. Provide some shrubs and trees to provide cover and perching branches. Water features, particularly waterfalls and fountains, are also a reliable means of attracting hummingbirds, as well as other birds.

If you have felt slighted by hummers so far this year, keep a sugar water feeder available to attract them on their way south later this summer and into the fall. To share a sighting, make a comment, or ask a question, send email to ahoodedwarbler@aol.com.

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Bryan Stevens has been writing about birds since 1995. To learn more about birds and other topics from the natural world, friend Stevens on Facebook at https://www.facebook.com/ahoodedwarbler. If you have a question, wish to make a comment or share a sighting, email ahoodedwarbler@aol.com.

Annual Fall Bird Count finds 125 species

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Photo by Bryan Stevens                  Red-tailed Hawks were found in good numbers on the recent fall count, but the species was outnumbered by migrating Broad-winged Hawks.

The Lee and Lois Herndon Chapter of Tennessee Ornithological Society held its annual Fall Bird Count back in September. The chapter’s five-county Fall Bird Count, the 47th consecutive survey conducted by the chapter, was held Sept. 24. A total of 39 observers (and two yard watchers) found a total of 125 species. Oppressive heat on the day of the count probably negatively affected bird numbers.
The Fall Bird Count, as well as the chapter’s annual Spring Bird Count, surveys bird populations in the upper Northeast Tennessee counties of Carter, Johnson, Sullivan, Unicoi and Washington.
The annual count is compiled by long-time chapter statistician Rick Knight.
The recent count was most notable for low numbers of many species. “A curious statistic: we had more Cedar Waxwings than European Starlings,” Knight remarked.
The all-time high on for a Fall Bird Count was 137 species in 1993.
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Photo by Bryan Stevens                                     Blue-winged Teal were among the migratory waterfowl found during the recent Fall Bird Count conducted by the Elizabethton Bird Club.

The total for this year’s Fall Bird Count follows:
Canada Goose, 1,118; Wood Duck, 40; Mallard, 224; Blue-winged Teal, 4; Green-winged Teal, 1; Ruffed Grouse, 2; Wild Turkey, 23; Pied-billed Grebe, 3; Double-crested Cormorant, 16; Great Blue Heron, 30; Great Egret, 10; Green Heron, 2; Black-crowned Night-Heron, 2; and Yellow-crowned Night-Heron, 1.
Black Vulture, 159; Turkey Vulture, 222; Osprey, 7; Bald Eagle, 4; Sharp-shinned Hawk, 2; Cooper’s Hawk, 10; Red-shouldered Hawk, 5; Broad-winged Hawk, 25; and Red-tailed Hawk, 22.
Killdeer, 66; Spotted Sandpiper, 3; Least Sandpiper, 4; Pectoral Sandpiper, 6; American Woodcock, 4.
Rock Pigeon, 365; Eurasian Collared Dove, 2; Mourning Dove, 174; Yellow-billed Cuckoo, 1; Eastern Screech-Owl, 14; Great Horned Owl, 8; Barred Owl, 8, and Northern Saw-whet Owl, 1.

 

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Photo by Bryan Stevens Downy Woodpecker was the most numerous woodpecker tallied on the fall count.

Common Nighthawk, 3; Chimney Swift, 379; Ruby-throated Hummingbird, 30; Belted Kingfisher, 33; Red-headed Woodpecker, 1; Red-bellied Woodpecker, 61; Yellow-bellied Sapsucker, 5; Downy Woodpecker, 42; Hairy Woodpecker, 10; Northern Flicker, 28; and Pileated Woodpecker, 32.
American Kestrel, 14; Peregrine Falcon, 2; Eastern Wood-pewee, 12; Acadian Flycatcher, 1; Empid species, 3; Eastern Phoebe, 68; and Eastern Kingbird, 1.
White-eyed Vireo, 2; Yellow-throated Vireo, 2; Blue-headed Vireo, 20; Red-eyed Vireo, 15; Blue Jay; 329; American Crow, 376; and Common Raven; 26.
Purple Martin, 1; Tree Swallow, 163; Barn Swallow, 1; Carolina Chickadee, 152; Tufted Titmouse, 124; Red-breasted Nuthatch, 12; and White-breasted Nuthatch, 36.

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Photo by Bryan Stevens                                                 A total of 54 Northern Mockingbirds, Tennessee’s official state bird, was found on the count.

Brown Creeper, 5; House Wren, 3; Carolina Wren, 139; Blue-gray Gnatcatcher, 2; Golden-crowned Kinglet, 23; and Ruby-crowned Kinglet, 5.
Eastern Bluebird, 91; Veery, 4; Gray-cheeked Thrush, 6; Swainson’s Thrush, 89; Hermit Thrush, 1; Wood Thrush, 16; American Robin, 343, Gray Catbird, 48; Brown Thrasher, 14; and Northern Mockingbird, 54.

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Photo by Bryan Stevens                                    Red Crossbills were among the finches tallied on this year’s Fall Bird Count.

European Starling, 426; Cedar Waxwing, 506; Ovenbird, 4; Worm-eating Warbler, 1; Northern Waterthrush, 1; Black-and-white Warbler, 4; Tennessee Warbler, 12; Orange-crowned Warbler, 1; Common Yellowthroat, 10; Hooded Warbler, 4; American Redstart, 13; Cape May Warbler, 7; Northern Parula, 3; Magnolia Warbler, 11; Bay-breasted Warbler, 6; Blackburnian Warbler, 3; Chestnut-sided Warbler, 2; Black-throated Blue Warbler, 3; Palm Warbler, 16; Pine Warbler, 11; Yellow-rumped Warbler, 2; Yellow-throated Warbler, 2; Prairie Warbler, 1; and Black-throated Green Warbler, 8.
Eastern Towhee, 65; Chipping Sparrow, 24; Field Sparrow, 11; Song Sparrow, 83; Dark-eyed Junco, 95; Summer Tanager, 2; Scarlet Tanager, 15; Northern Cardinal, 138, Rose-breasted Grosbeak, 43; and Indigo Bunting, 13.
Red-winged Blackbird, 61; Eastern Meadowlark, 10; Common Grackle, 156; House Finch, 51; Red Crossbill, 2; Pine Siskin, 10; American Goldfinch, 231; and House Sparrow, 38.

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The season’s first White-throated Sparrow showed up at my home on Oct. 30. I’m hopeful that the sparrow is but the first of many new arrivals ahead of the winter season. To share a sighting, ask a question or make a comment, send an email to ahoodedwarbler@aol.com.

Arduous migration journeys by some birds represent wondrous natural achievements

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Photo by Bryan Stevens                                                          This rose-breasted grosbeak struck a window Monday, Oct. 3, during fall migration. Although this bird rested and later recovered, many birds are felled by similar perils and obstacles as they migrate south each fall.

A stunned rose-breasted grosbeak recuperating on the front porch on Oct. 3 provided a reminder that migrating birds face a variety of perils and obstacles as they wing their way back south. Now that we’re into October, many of the birds of summer — orioles, tanagers, warblers and hummingbirds — are becoming scarce in our yards and gardens. These neotropical migrants are temporary visitors, remaining in North America only long enough to nest and raise young before they take to the wing to return to more tropical regions for the winter months that will grip their summer home in snow and ice for several months.

Some of these birds migrate out of the tropics to avoid competition. Others find North America a land of abundant, albeit temporary, resources. This land of plenty offers a wealth of insects, seeds, fruit and other nourishing, nutritious food to help parent birds keep their strength while they work to ensure their young thrive. The phenomenon of migration isn’t exclusive to the neotropical migrants of the New World. Birds in other parts of the world migrate, too.

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Photo by U.S. Fish & Wildlife Service                 The tiny ruby-throated hummingbird crosses the Gulf of Mexico twice yearly to migrate from Central America to North America in the spring and back again in the fall.

The Arctic tern, for example, truly takes migration to extremes. This small seabird travels each year from its Arctic nesting grounds to the Antarctic region, where it spends the winter months. Put into terms of mileage, the Arctic tern can travel about 50,000 miles in a single year. For a bird with a body length of about 15 inches and a wingspan of about 28 inches, this incredible migration is an astonishing feat.

The ruby-throated hummingbird, a favorite of many bird enthusiasts living in the eastern United States, makes an impressive migration each year. Just to reach the United States, these tiny birds undertake a strenuous journey. They leave their wintering grounds in Central America to return to the United States and Canada for the nesting season. Most of these tiny birds, which are barely four inches long, make a non-stop flight of more than 500 miles across the Gulf of Mexico. The journey can take almost an entire day! With the end of summer, the entire population of ruby-throated hummingbirds, increased by a new generation of young birds, makes the Gulf crossing for a second time in a year to return to the American tropics for the winter months.

The broad-winged hawk, a raptor found in the region during the summer, makes a fall migration back to South America every fall that astonishes human onlookers who gather along mountain peaks to witness the spectacle. The hawks form large flocks, also called kettles, that can number thousands of birds.

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Photo by U.S. Fish & Wildlife Service/Steve Maslowski The bar-tailed godwit stages migrations that can take nine days of non-stop flight spanning nearly 6,000 miles.

Shorebirds, which in North America can consist of birds ranging from plovers and godwits to dowitchers and avocets, are champion migrants. The bar-tailed godwit makes an even more impressive non-stop migratory flight. This shorebird nests in parts of Scandinavia, northern Asia and Alaska. Some of these godwits make a nine-day non-stop migratory flight that takes them from New Zealand to the Yellow Sea of China, a distance of almost 6,000 miles. Needless to say, since the godwits make no stops along the way, they must also go without food for the duration of their journey.

Most of the warblers that nest in North America retreat to Central and South America during the winter months. Few warblers, however, make as great a journey as the blackpoll warbler. Instead of migrating over land, this five-inch-long warbler undertakes a two-stage migration. The first half of the migration is a non-stop flight of about 1,500 miles. Every fall, these tiny birds fly over the ocean during this part of their migration, departing from Canada or the northern United States and not stopping until they reach various locations in the Caribbean. There they will spend some time recovering from the exhausting first half of their journey before they continue their way to such South American countries as Colombia and Venezuela. Once again, during the time they spend flying over open ocean, these tiny warblers do not feed.

Even birds that cannot fly undertake migrations. For instance, flightless penguins swim hundreds or thousands of miles to reach preferred ranges for feeding or nesting. The Australian emu, a smaller relative of the ostrich, makes seasonal migrations on foot to ensure access to abundant food supplies at all seasons.

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Photo by U.S. Fish & Wildlife Service/Kirk Rogers         The Arctic tern’s migration, which takes it from the Arctic to the Antarctic, keeps this small seabird in the sky for about 50,000 miles each year.

Birds are not even the only animals to migrate. Many creatures, from whales and wildebeest to dragonflies and butterflies, impress humans with their endurance as they stage regular migrations.

Even as some of our summer favorites depart, we should prepare to welcome back some winter favorites, including dark-eyed juncos, yellow-rumped warblers, white-throated sparrows and yellow-bellied sapsuckers. Fall is indeed a time of departure for many birds, but it’s also a time to make new friends with the other birds that should soon start arriving in our yards and gardens.

As for the rose-breasted grosbeak on the porch, that story had a happy ending. After taking some time to recover after apparently striking a window, the bird hopped around the porch for a moment and then took wing and flew to nearby hawthorn trees. The bird’s flight — strong and straight — delighted me. The grosbeak could have been badly injured or even killed. I wished it the best for the remainder of its journey.

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I’m dedicating this week’s column to the memory of J. Wallace Coffey, a great birder and wonderful individual who died Tuesday, Sept. 27. I met Wallace, a native of Bristol, Tennessee, back in the late 1990s. He introduced me to some wonderful birding destinations in the region, including such Virginia locations as Burke’s Garden, Steele Creek Park in Bristol, the wetlands of Saltville and Musick’s Campground on Holston Lake. Wallace was a tireless promoter of birds, birding and birders, and he loved to encourage young people to explore nature. He was also a great leader for the Bristol Bird Club, as well as the Elizabethton Bird Club. He will be greatly missed.
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Bryan Stevens lives near Roan Mountain, Tennessee. To learn more about birds and other topics from the natural world, friend Stevens on Facebook at https://www.facebook.com/ahoodedwarbler. He is always posting about local birds, wildlife, flowers, insects and much more. If you have a question, wish to make a comment or share a sighting, email ahoodedwarbler@aol.com.

Worm-eating warbler less conspicuous member of family of bright, active migratory songbirds

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Photo by U.S. Fish & Wildlife Service                The worm-eating warbler is one of the more nondescript warblers.

It’s September, which for me signals the autumn migration season of warblers and other neotropical birds. The warblers are a family of small songbirds that also happens to be the main reason I enjoy bird watching. Although warblers can be a challenge to observe and a puzzler to identify, they’re bundles of multi-colored feathers brimming with high-octane energy as they forage in treetops, along woodland edges, in weedy fields and around ponds and streams.

Like all migrating birds, warblers face numerous obstacles and hazards as they fly back south every fall after spending most of the spring and the entire summer spread across the United States and Canada for the season of nesting and raising young. Storms, such as the recent Hurricane Hermine, can be a hazard. Predatory raptors, like peregrine falcons and merlins, follow the migration routes and pick off various migrants. Even something as mundane as a window pane can bring a tragic halt to migration each year for thousands of our smaller songbirds.

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Photo Courtesy of Dianna Lynne Tucker           This worm-eating warbler perched on a flower pot while recovering from an impact with a window.

I recently received an email from Chris Soto, a fellow member of the Lee and Lois Herndon Chapter of the Tennessee Ornithological Society. Her sister, Dianna Lynne Tucker, resides in Elizabethton, Tennessee, near Holston Mountain. Her home has a yard that is a magnet for a variety of songbirds. One of the birds passing through her yard had an unfortunate impact with a window. Chris and Dianna already suspected the identity of the bird, but they emailed me asking for help to confirm it. I concurred that the bird was a worm-eating warbler.

“After a brief rest, the bird recovered,” Chris noted in the email. I always like a story with a happy ending.

The scientific name for this warbler is interesting. The worm-eating warbler, or Helmitheros vermivorum, is in a genus of one. It’s the only species contained within the genus. Vermi means “of or relating to worms” while vorum is related to eating. Hence, vermivorum is quite literally an “eater of worms.” The worms in this warbler’s diet, however, are not earthworms. Instead this bird feeds on caterpillars, the larval form of moths and caterpillars. The worm-eating warbler has one unusual foraging method to look for caterpillars. This warbler will often cling to a cluster of dead leaves while probing into the tangle to seek out any concealed caterpillars, as well as small insects and spiders. All in all, the worm-eating warbler doesn’t feed any more exclusively on caterpillars than other warblers.

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Photo Courtesy of Dianna Lynne Tucker         Like other songbirds, the migratory worm-eating warbler faces many perils during its annual fall migration.

This warbler’s non-musical song is a dry trill that compares with the songs of chipping sparrows and dark-eyed juncos. Since these other birds can be found in similar habitats, it can be a bit of a challenge for beginners to identify this warbler by sound alone. The worm-eating warbler isn’t one of the more colorful members of the family. It has a subtle beauty, however, with a plumage of brown and buff feathers. The most distinctive part of its appearance are the black stripes that run along the crown and a dark stripe through the eye. This warbler has a pinkish bill. Both males and females look alike.

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Photo Courtesy of Brian Rovira                        This worm-eating warbler recovered after striking a window at the home of Brian Rovira in Unicoi, Tennessee.

According to the website All About Birds, the oldest worm-eating warbler ever documented was a male that was at least eight years, one month old when he was recaptured and rereleased during banding operations in Connecticut. I’ve seen fewer of this particular warbler over the past ten years, but the overall population figures for this species have actually trended slightly upward. The worm-eating warbler’s population is concentrated in the southeastern United States. It favors deciduous woodland habitat with shaded banks, steep gullies and ravines. The habitat around my home must have changed enough that they are no longer a frequent visitor. The worm-eating warblers will migrate to Mexico and Central America this fall, electing to spend the winter months in warmer terrain.

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Early American naturalist and painter John James Audubon painted the worm-eating warbler in company with some native butterflies.

Warblers and their active lifestyles can be a challenge for human observers. Nevertheless, it’s worth the effort to seek out these colorful, energetic and interesting songbirds. Many people like to look for returning spring warblers, but I’ve always found the fall season the best time to look for these birds. September is the month when the majority of these warblers will migrate through our region. Warblers ignore offerings of seeds at our feeders, but a bird bath, ornamental fountain, pond or stream is like a magnet drawing these migrants to stop, enjoy a cool drink and a vigorous splash in the inviting water.

Keep a pair of binoculars at hand and your eyes open. If you’d like to share your observations of migrants passing through your yard this fall, I’d love to hear from you.

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Bryan Stevens lives near Roan Mountain, Tennessee. To learn more about birds and other topics from the natural world, friend Stevens on Facebook at https://www.facebook.com/ahoodedwarbler. He is always posting about local birds, wildlife, flowers, insects and much more. If you have a question, wish to make a comment or share a sighting, email ahoodedwarbler@aol.com.

October brings bird walks and new arrivals

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Photo by Bryan Stevens                                      An Eastern Phoebe perched on a barbed wire fence.

The end of October punctuates the annual spectacle of fall migration. By the end of the month, most of the summer residents — hummingbirds, vireos, tanagers, warblers —will have migrated out of the region to distant wintering grounds. In the waning days of October, winter residents — Brown Creepers, Winter Wrens, Dark-eyed Juncos, Hermit Thrushes and much more — take up residence in our yards, where they will keep a low profile during the fewer hours of daylight during the long winter months.

So far, I have already welcomed a Marsh Wren and Winter Wren to my yard, and I am looking forward to the arrival of winter sparrows.

I have once again been leading bird walks every Saturday in October at Sycamore Shoals State Historic Park in Elizabethton. There are still two walks — Oct. 24 and Oct. 31 — for interested persons to attend and try to get a look at some of the late-fall migrants passing through the region. The walks begin at 8 a.m. Bring binoculars to increase your viewing enjoyment.

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Photo by Bryan Stevens                One of the lingering Ruby-throated Hummingbirds perches in branches near a hanging feeder.

The first two walks were cancelled due to rain, but on a very chilly morning on Oct. 18 the first walk finally commenced. Five participants joined me for a morning stroll on the park trails and along the Watauga River. We saw Wood Ducks, Mallards and Canada Geese, as well as several flocks of Cedar Waxwings, along with Blue-headed Vireo, Yellow-rumped Warbler and several woodpeckers, including Downy, Red-bellied, Pileated, Northern Flicker and Yellow-bellied Sapsucker.

At home, the seasons are definitely shifting. Although a few Ruby-throated Hummingbirds lingered (as of Oct. 18), the first White-throated Sparrow put in an appearance on Oct. 14. Winter residents are gradually displacing departing summer visitors.

Last year’s bird walks at Sycamore Shoals produced some good birds, including a female Common Merganser that was discovered in the Watauga River. Other good finds have been found in past years.

On Sunday, Oct. 11, my mother and I enjoyed watching a female Common Merganser on the Watauga River.

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Photo by Bryan Stevens                                                                    A Common Merganser on the Watauga River associated with Canada Geese and Mallards.

In Europe, the Common Merganser is called a Goosander, probably a nod to its large size that makes this bird superficially more similar to geese than ducks. Early naturalists such as John James Audubon also provided this bird with a different name, referring to it as the “Buff-breasted Merganser.”

For many years, the Common Merganser was one of my target birds. Finally, more than 10 years ago, I saw my first Common Mergansers during a visit to Middlebrook Lake in Bristol with Reece Jamerson, Gil Derouen and the late Howard Langridge.

Despite the word “common” in its name, this merganser isn’t particularly common in Northeast Tennessee. Its relatives, Hooded Merganser and Red-breasted Merganser, are much more regular visitors to the region.

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Photo by U.S. Fish & Wildlife Service                    A male Common Merganser takes a swim.

The Common Merganser, particularly the males, are easily identified. Apart from their large size, which is about 26 inches long for males, males of this duck have a dark green head and upper neck. The lower neck, breast and underparts are creamy-white with a varying amounts of a pink or reddish wash. The back is black, while the bill, legs and feet are red. Females are similar to female Red-breasted Mergansers but show a clearly defined white chin patch lacking in their close relative.

According to the website Ducks Unlimited, Common Mergansers breed from Alaska, the southern Yukon, Labrador and Newfoundland south to central California, Arizona, New Mexico, southern Chihuahua and east of the Rockies to Minnesota, Michigan, New York, New England and Nova Scotia.

They are also one of the biggest of North America’s cavity-nesting birds, utilizing natural cavities in trees, as well as man-made nesting boxes. They will also nest on the ground.

Common Mergansers feed mainly on fish, amphibians, crustaceans, mollusks and other aquatic organisms.

The last extensive population surveys of Common Mergansers took place during the 1970s, when the population in North America was estimated at 1.5 million birds.

May population surveys during 1970-’79, suggested a continental population of 1.5 million birds. Population tracking has been lacking in recent decades, but experts believe that Common Mergansers have a stable population.

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Photo by Bryan Stevens                                        A Common Yellowthroat hides in a tangle of brush during a migration stop.

When November arrives, I’ll be keeping watch for ducks making stops at the pond at Erwin Fishery Park or along the series of ponds located along the linear walking trail in Erwin. I’ll also make a journey to Wilbur Lake, one of my favorite destinations, to look for returning Buffleheads.

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To learn more about birds and other topics from the natural world, “friend” Bryan on Facebook at https://www.facebook.com/ahoodedwarbler. He is always posting about local birds, wildlife, flowers, insects and much more. If you have a question, wish to make a comment or share a sighting, email ahoodedwarbler@aol.com.

Goldenrod

Photo by Bryan Stevens                                                                                        Blooming Goldenrod looks splendid in fall sunshine.

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Photo by Bryan Stevens                                      The Autumn Meadowhawk, pictured, and Shadow Darners are some of the final dragonflies flying around the fish pond as cooler weather arrives.

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Photo by Bryan Stevens                                                    Some Ruby-crowned Kinglets, such as this individual, may overwinter in Northeast Tennessee.