Monthly Archives: March 2019

Smallest of the nuthatches finds a niche at woman’s feeders

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Photo by Lee Karmey/USFWS • A pygmy nuthatch captures a caterpillar.

Veronica Rausch contacted me by email to share a story of the nuthatches that frequent the feeders at her home in central Oregon.

“I have a small flock of pygmy nuthatches coming into the feeders next to my dining room window on a regular basis,” Veronica wrote, adding that the nuthatches began their visits about three weeks ago.

Veronica wrote that she lives in the pine forests of Central Oregon at an elevation of about 4,200 feet.

“The pygmy nuthatches are delightful little birds and share the feeders with the chickadees and juncos,” she wrote. “The bigger birds such as the Stellar’s jays and the woodpeckers will cause them to leave.”

Veronica has also enjoyed observing their unusual antics. “I saw one do a little dance on a branch by the suet feeder,” she described in her email. “Unfortunately, I wasn’t able to grab the camera fast enough! I hope they stick around.”

I replied to Veronica’s email, noting how I consider her fortunate to be hosting the smallest of North America’s nuthatches at her home. Admitting to some envy at her good fortune, I explained that I hope to some day add this species to my life list so I can check all of the continent’s nuthatches off my list of target birds.

Even by nuthatch standards, the pygmy nuthatch is a small bird. In appearance, this nuthatch shows buffy-white underparts contrasted with a brown head and a slate-gray back. They often breed in large extended family flocks, so the four individuals observed by Veronica might very well have been closely related to each other.

Nesting pygmy nuthatches are often assisted in their chores by “nest helpers,” which are close relatives that help the busy parents gather food and feed hungry young. These nest helpers also deliver food to females as they incubate eggs and will mount a spirited defense of a nest threatened by intruders. Their communal nature extends to nocturnal roosting when many individuals will huddle together to ensure their combined body heat helps them survive extremely cold nights.

So how small is the pygmy nuthatch? The adults are barely four inches long and weigh only a third of an ounce. A common fountain pen weighs more than this tiny nuthatch, which goes a long way towards explaining the bird’s scientific name, sitta pygmaea.

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Photo by theSOARnet/Pixabay.com • The brown-headed nuthatch, the southeastern counterpart to the pygmy nuthatch that ranges throughout the Rocky Mountain states, is strongly associated with various types of pine trees.

Pygmy nuthatches are not at all likely to be found in the Mountain Empire or any adjacent areas, but there is another small nuthatch that is found in some extremely localized habitats in the region. The brown-headed nuthatch is a specialist of pine woodlands throughout the southeastern United States, favoring loblolly-shortleaf pines and longleaf-slash pines. This nuthatch requires standing dead trees for nesting and roosting. They forage for food, however, on live pines. The birds are more abundant in older pine stands.

I saw several brown-headed nuthatches during a recent stay on Fripp Island in South Carolina. I’ve also observed this small nuthatch during visits to Chattanooga, Tennessee, and Atlanta, Georgia, as well as various other locations in South Carolina. This nuthatch even occurs in the Mountain Empire region, most recently with four of these birds being found at Washington County Park on South Holston Lake near Bristol during the 2018 Christmas Bird Count conducted by the Bristol Bird Club.

These small birds will occasionally forage close to the ground, but they are often in the upper branches of pine trees. Their presence is often revealed by their call, which sounds amazingly like a squeeze toy. They produce their “squeaky toy” call persistently when agitated or curious. Brown-headed nuthatches often associate with mixed flocks in company with Carolina chickadees, tufted titmice, pine warblers and other small songbirds.

The power of flight gives most birds a perfectly valid reason to disregard the power of gravity. The family of tree-clinging birds known as nuthatches lives an even more topsy-turvy lifestyle than many other of their winged kin. Nuthatches prefer a headfirst stance, even “walking” upside down as they search for food in the nooks and crannies of tree trunks and branches.

The United States is home to four species of nuthatches: white-breasted, red-breasted, brown-headed and pygmy. White-breasted nuthatches are probably the most familiar nuthatch to backyard birders in this area.

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Photo by Bryan Stevens • A white-breasted nuthatch clings to the bark of a tree.

Because of their gravity-defying antics, the white-breasted nuthatch and other members of the family can provide hours of entertainment at our bird feeders. Individual white-breasted nuthatches will follow a single-minded path along the trunk of a tree or a branch on the way to a feeder. An individual nuthatch rarely varies from this path. It’s amusing to watch the jerky progress along the trunk as this bird prepares for a flight to a feeder holding sunflower seeds or a hanging wire basket of suet.

At my home, nuthatches typically remain aloof from the always-ongoing rivalry between the chickadees and titmice. The white-breasted nuthatch is also a no-nonsense visitor. Rarely distracted by disturbances among other birds, this nuthatch is content to grab a seed and go or hang on to the wire frame of a suet basket and peck off chunks of suet.

The more numerous titmice and chickadees give way when a white-breasted nuthatch claims a feeder. At times, however, among the frantic activity, a tufted titmouse or a Carolina chickadee will forget itself and fly to a position on a feeder already claimed by a nuthatch. If surprised enough to retreat to a nearby perch, the nuthatch will go through a rather comical little dance to express its displeasure. Wings spread out in a rigid pose, the bird will turn around in tight circles, showing definite resentment at being displaced by an offending chickadee or titmouse.

The stubby red-breasted nuthatch is another member of the family that occasionally finds its way to our yards. Smaller than the related white-breasted nuthatch and, as far as I can tell, complacent in the company of chickadees and titmice, the red-breasted nuthatch is always a welcome visitor. It has a tell-tale “yank yank” call that it produces when excited that sounds very much like little tin horns. The red-breasted nuthatch, perhaps because it spends so much of the year in more remote areas, can also be amazingly tame when it pays a winter visit.

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Photo by Bryan Stevens • A red-breasted nuthatch clings to the mesh of a feeding tube to get at the peanuts contained within.

Nuthatches can be attracted to feeders by offering peanuts, sunflower seeds and suet. They are also cavity-nesting birds, but are more reluctant about accepting a nesting box as a place to rear young. They will gladly accept an old woodpecker hole or other natural cavity in a tree.

I also want to complete my list of North American nuthatches by adding the fourth species — pygmy nuthatch — to my life list. I have made two trips to western North America, where this species ranges, but haven’t managed to find this bird. Both the pygmy and brown-headed are among the smallest members of the nuthatch family.

On the other end of the size scale is the appropriately named giant nuthatch, which reaches a length of almost eight inches. The giant nuthatch ranges through China, Thailand and Burma. This nuthatch is bigger than a downy woodpecker, one of our more common visitors at backyard feeders in our region.

Worldwide, there are about 25 species of nuthatches, some of which have surprisingly descriptive names for birds that spend most of their lives creeping in obscurity along the trunks and branches of trees. Some of the more creative common names for these little birds are inspired by locations around the globe, giving us species like Siberian nuthatch, Kashmir nuthatch, Burmese nuthatch, Bahama nuthatch, Algerian nuthatch, Indian nuthatch and Chinese nuthatch.

These birds are named “nuthatch” for the habit of some species to wedge a large seed in a crack and hack at it with their strong bills. I like to refer to them as “upside-down birds” because of their gravity-defying nature. It must give them an interesting perspective on the world around them.

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Photo by Bryan Stevens • In some areas, brown-headed nuthatches are feeder visitors. These small nuthatches are specialists that favor stands of loblolly pine.

High school senior looking out for interests of the region’s bluebirds

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Photo by Bryan Stevens • A handsome male Eastern bluebird perches on a chain-link fence.

Observant people have probably noticed Eastern bluebirds already checking out possible nesting locations. These cavity-nesting birds begin scouting for possible nest sites in February and March. By April, female bluebirds may be incubating a clutch of eggs.

Although bluebirds will nest in natural cavities in trees, they respond readily to the availability of nesting boxes provided by human landlords. Many people are devoted to the cause of seeing that bluebirds — a favorite of many — continue to thrive in the face of certain challenges.

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Photo by Adrianna Nelson • Bluebirds are skillful at foraging for insects.

Eighteen-year-old Adrianna Nelson is one such person. A senior at John S. Battle High School, Adrianna said she recently became involved with the Tennessee Bluebird Society as a way to become active with a conservation-related activity involving birds.

“I only recently got involved with TBS,” she said.

She began looking last summer for a way to contribute locally to the welfare of birds.

“I came across the TBS website,” she said. “They didn’t have a coordinator for Sullivan County, so I decided to fill the position.”

Nelson said she is interested in all birds but enjoys focusing on bluebirds and other cavity nesters to spread knowledge about their importance.

“TBS focuses on bluebirds,” she said.

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Photo by Bryan Stevens A male Eastern Bluebird inspects a nesting cavity in a wooden fence post. When such cavities are scarce, bluebirds readily build in nest boxes.

Bluebirds are like the “poster child” for the organization, Nelson noted, but she also pointed out that TBS also promotes the conservation of other native cavity nesters.

As county coordinator for TBS, her job primarily involves giving presentations to raise awareness about bluebirds and other cavity-nesting bird species.

“I have already presented to the Bristol Bird Club, and I plan to still give a few more presentations,” she said.

“I can also set up bluebird trails,” Nelson said. “I have not done any trails this year, but I have plans for next year. Part of my responsibilities is also to maintain trails and answer questions from the community.”

 

There are some good reasons for people to offer extra support to help bluebirds thrive.

“Eastern bluebirds are native cavity nesters,” Nelson said. “They are not strong enough to excavate their own cavities, so starlings and house sparrows can take over natural and man-made structures very quickly. It is important to promote the longevity of native species. Not only are they important, they are very beautiful.”

There are several things that people can do to make their yards and gardens more attractive to bluebirds.

“One of the most important is to make sure that there is proper habitat,” Nelson explained. “Bluebirds prefer open areas with some trees or other perches for spotting insects.”

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Photo by Bryan Stevens • A female Eastern Bluebird gathers pine needles to use as nesting material. Bluebirds are a cavity-nesting species that will use natural or manmade cavities.

For those interested in attracting nesters, Nelson said that picking the right nest box and proper placement is important.

She helps maintain nesting boxes along a bluebird trail at Steele Creek Park in Bristol.

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Photo by Adrianna Nelson • Eastern bluebirds are a beautiful bird to welcome into the backyard.

In addition, providing plenty of water helps. “Bluebirds also like meal worms, but plants such as dogwoods, sumac, pokeweed, viburnum, and others can provide food, especially in the winter,” Nelson said.

Keeping predators away is crucial. According to Nelson, this can be achieved with simple actions such as keeping cats indoors.

“There are more details about bluebirds, boxes, nesting, predators, habitat and more online on the North American Bluebird Society website,” Nelson added.

Nelson shared some fascinating facts about bluebirds.

“They can spot insects from over 50 yards away,” she said.

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Photo by Bryan Stevens • Eastern Bluebirds are year-round residents in Northeast Tennessee.

Bluebirds are bigger than small songbirds like chickadees, wrens and warblers, yet they weigh only about one ounce.

Bluebirds are truly “early birds,” according to Nelson. “Eggs usually hatch within the first two hours after dawn,” she said.

There are no local meetings of the Tennessee Bluebird Society, but an annual meeting for TBS is held in November. The meeting is open to the public.

TBS and North American Bluebird Society members get quarterly journals and newsletters. There is also information on the websites of the two organizations for anyone interested in bluebirds.md19917207443

NABS was founded in 1978 by Dr. Lawrence Zeleny in order to promote the preservation of bluebirds, a cavity-nesting species in decline at that time. Zeleny, with the support of his wife, Olive, dedicated much of his life to providing nestboxes and managing bluebird trails. He promoted bluebird conservation through hundreds of talks and articles in many periodicals.

The Eastern bluebird has two close relatives — the Western bluebird and the mountain bluebird. These species belong to the genus, Sialia, which is counted among the world’s thrushes.The Western bluebird ranges throughout California, the southern Rocky Mountains, Arizona and New Mexico. The mountain bluebird is widespread in the western United States, as well. Two states — Idaho and Nevada — have bestowed official status on the mountain bluebird as their official state bird. The Eastern bluebird has also been honored with that designation by the states of Missouri and New York.

The Eastern bluebird suffered serious decline from 1940 into the 1960s, but it is now a common bird in the region. Rick Knight, author of The Birds of Northeast Tennessee, notes that nest boxes were instrumental in the recovery of the Eastern bluebird.

Nelson is continuing the work pioneered by others to conserve the Eastern bluebird. She lives in Bristol, Virginia, with her parents, Sandi and Shawn Nelson. She welcomes the public to contact her about bluebirds by emailing adriannan1@hotmail.com.

To learn more about the Tennessee Bluebird Society, visit http://www.tnbluebirdsociety.org. For more information on the North American Bluebird Society, visit wwwna.bluebirdsociety.org.

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Photo by Bryan Stevens A young Eastern Bluebird slowly gains independence after leaving the nest.

White-throated sparrows advertise their presence in yards and gardens with spring singing

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Photo by Skeeze/Pixabay • A white-throated sparrow perches on a branch to sing its easily recognizable song. Many Americans translate the sparrow’s song as “Ol’ Sam Peabody, Peabody, Peabody.”

The calendar has turned to March, and — when it comes to birds — the month is a time of transition. The season doesn’t know whether it’s winter or spring, but the birds know. They, like me, are anticipating the busy spring season.

The clientele at your feeders may change significantly in March. The winter residents are still present, but newly-arrived birds make appearances. Red-winged blackbird, common grackles, and brown-headed cowbirds, all of which may have retreated farther south during the peak of winter, can arrive suddenly in large flocks to lay claim to offerings like suet and sunflower seeds.

On our lawns, we should be noticing flocks of American robins. Long considered a harbinger of spring, the American robin is actually a year-round resident in the region. Spring’s false starts sometimes take robins by surprise, which results in large flocks of these bird descending on lawns and fields to forage frantically for earthworms and insect grubs.

Many people are probably noticing more bird song in the morning. At my home, I’ve been hearing more from birds ranging from song sparrows and chickadees to bluebirds and Northern cardinals, as well as white-throated sparrows. Although they are fairly common winter visitors in the region, the white-throated sparrow makes its presence known most strongly each spring when the birds begin to sing a familiar refrain that has been transcribed in a couple of different ways. Many Americans render the song of the white-throated sparrow as “Ol’ Sam Peabody, Peabody, Peabody.” For those living north of the border, the white-throated sparrow sings “O’Canada, O’Canada, O’Canada.” As I mentioned, it’s a song I’ve been hearing much more frequently in the past couple of weeks. No matter how you translate this sparrow’s song, it’s a sweet and welcome addition to the spring aural landscape.

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Photo by U.S. Fish & Wildlife Service/Thomas Barnes • White-throated sparrows are a common winter resident in yards and gardens throughout the eastern United States.

The white-throated sparrow also has a close relative that is a little less common. The white-crowned sparrow is one of the more distinctive species in a family often unfairly dismissed as “little brown birds.” It’s fairly common to find mixed flocks of both of these and other sparrows feeding together. They start the mingling process in the fall, probably to prepare them for the necessity of close proximity when winter makes it necessary to crowd together to find food. At my own feeders, I often host mixed flocks of several sparrows, including song sparrows, chipping sparrows, white-throated sparrows and dark-eyed juncos, as well as the occasional field sparrow or swamp sparrow.

The white-throated sparrow and the closely related white-crowned sparrow both belong to a genus of American sparrows known as Zonotrichia, which includes three other species. These other three — golden-crowned sparrow, rufous-collared sparrow, and Harris’s sparrow — range mostly outside the continental United States. The rufous-collared sparrow ranges throughout Mexico, as well as the island of Hispaniola. Harris’s sparrow is a bird that occurs mostly in Canada, although there are a handful of records in our region. The golden-crowned sparrow is a bird that occurs mostly in Alaska, although some of this sparrow’s population ranges into the northwestern corner of the state of Washington.

The genus name, Zonotrichia, refers to two ancient Greek words for zone and hair, which refers to the pattern of streaks on the backs of these five sparrow species. The Zonotrichia sparrows belong to a large group of birds known as Passerellidae, or American sparrows, which also includes birds such as juncos, towhees and brush finches. Some of the more descriptive names of some of the American sparrows include orange-billed sparrow, white-eared ground sparrow, green-backed sparrow, olive sparrow, cinnamon-tailed sparrow, five-striped sparrow and golden-winged sparrow.

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Photo by Bryan Stevens • The white-crowned sparrow is a very aptly named bird.

I love white-crowned sparrows, but they are rare visitors to my feeders. They occasionally pass through my yard in the fall, but they rarely stay more than a couple of days. I get plenty of white-throated sparrows and dark-eyed juncos, however, which is nice compensation. The white-crowned sparrow is more numerous in the western half of the United States. In a trip to Utah in October of 2003, these large, striking sparrows were seemingly everywhere. In the eastern United States, the white-crowned sparrow usually makes appearances as a migrant or a winter resident. These sparrows do seem faithful to wintering locations once they have spent a season. The only requirement for attracting them is a yard that offers some extensive thickets or other brushy habitat. A hedgerow bordered by a spacious lawn or field is also a magnet for this particular sparrow.

This accurately named white-crowned sparrow is easy to distinguish from all the other “little brown birds” in the sparrow family. First, for a sparrow, it’s somewhat large. Second, there’s the distinctive black-and-white head pattern that gives the bird its name. Of course, only the adult sparrows show the black and white head pattern. Young birds show alternating bands of tan and brown in place of the black and white. Both adults and young birds show a crisp gray breast that also helps distinguish them from other sparrows, which often have brown streaking across the breast. A pale bill also sets them apart from most other sparrows likely to visit feeders.

In similarly distinctive fashion, the white-throated sparrow, especially as spring gets nearer, also acquires a plumage that makes it stand out from the flock. These sparrows have a plumper shape than some of their kin. They have a black and white pattern to their head and a neat “bib” of white feathers covers the throat. The standout feature to this bird’s appearance is the bright yellow spot located between each eye and the bird’s bill. Some winter birds may lack this spot of yellow or show a less dramatic version, but the approach of spring usually puts white-throated sparrows into fine form.

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Photo by Skeeze/Pixabay • A white-throated sparrow perches on a branch to sing its easily recognizable song. Many Americans translate the sparrow’s song as “Ol’ Sam Peabody, Peabody, Peabody.”

Many sparrows, including the white-throated sparrow, prefer to forage for food on the ground. It’s often helpful to purchase a supply of millet seed. When filling your feeders with sunflower seeds, scatter a couple of handfuls of millet seed on the ground beneath the feeders or at the edge of a brushy area. Sparrows like to have quick access to dense cover, so they will feed more securely if the scattered seeds are within quick reach of shelter.

Sparrows don’t always co-exist peaceably. According to the website allaboutbirds.com, many of the larger sparrow species are quite aggressive with their kin. This aggression usually demonstrates itself in a tendency to chase other birds. Apparently, white-crowned sparrows will share their territories with fox sparrows — which are larger birds — but they will give chase to chipping sparrows and dark-eyed juncos in an attempt to drive them from the territory.

Most songbirds live a precarious life that can be measured in only a few years. However, an occasional individual defies the odds. According to the website allaboutbirds.com, the oldest recorded white-throated sparrow was at least 14 years, 11 months old, when it was recaptured and rereleased during banding operations in Alberta, Canada.

Listen for the song of this garden and yard visitor as you go about your daily routine. It’s easy to recognize, depending on your preference for the Canadian or American version. Don’t wait too long. Most white-throated sparrows depart the region by late April to reach their summer nesting grounds throughout the forests across Canada, the northeastern U.S. and the northern Midwest.

Hear the song and see video footage of a white-throated sparrow at White-throated sparrow singing.

American wigeon also known by name ‘baldpate’

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Photo by Tim McCabe/U.S. Fish & Wildlife Service • This male American wigeon shows the white head patch that gives this duck its other common name of “baldpate.” In this photograph, a female wigeon rests near her mate while a male redhead, a species of diving duck, swims in the background. This duck nests in season wetlands in the American midwest.

Erwin, Tennessee, resident Pattie Rowland recently asked my help identifying some ducks she had photographed at the pond at Erwin Fishery Park. She already suspected the ducks in her photo were American wigeons, but she wanted confirmation.

The ducks were indeed wigeons, which are classified with the “dabblers” instead of the “divers,” which are two broad categories for describing the wild ducks likely to occur throughout North America. Dabblers feed mostly near the surface of the water, foraging on everything for aquatic insects to roots and tubers. The “divers,” not surprisingly, dive into the depth to pursue fish, mollusks and other aquatic prey.

“This was my first time to see them,” Pattie noted in a Facebook message. I congratulated her because I know how exciting a new observation of a bird can be.

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Photo by Roy Lowe/U.S. Fish & Wildlife Service • A male American wigeon looks quite at home swimming on a small pond. Wigeons belong to ducks that are classified as “dabblers” and “puddle ducks.”

It’s not been an exciting winter for ducks in the region. Other than some redheads and buffleheads back in November and early December at the start of the winter, the wigeons are the only wild ducks of interest that I’ve observed at the pond.

The U.S. Fish and Wildlife Service released its report this past summer on 2018 Trends in Duck Breeding Populations, based on surveys conducted in May and early June of 2018 by FWS and Canadian Wildlife Service.

Overall duck numbers in the survey area remained high, according to the report. Total populations were estimated at 41.2 million breeding ducks in the traditional survey area, 13 percent lower than last year’s estimate of 47.3 million but 17 percent above the long-term average. The projected mallard fall flight index was estimated at 11.4 million birds, down from the 2017 estimate of 12.9 million.
“The dip in the population for prairie-breeding puddle ducks is not unexpected and by no means unprecedented given that conditions on the prairies this spring were drier than last year,” said DU Chief Scientist Tom Moorman. “As a result, 2018 populations dropped accordingly. However, populations of all key species except northern pintails and scaup remain above long-term averages. This year’s breeding population decline is a reminder of the need to sustain the capacity of breeding habitats, particularly in the prairies as we go through natural variation in wetland conditions. Waterfowl populations are adapted well to short-term swings in habitat conditions, but we must continue to guard against the long-term loss of prairie breeding habitat.”

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Early naturalist and artist John James Audubon painted this pair of American wigeon, a duck for which the male has earned the name “baldpate” for a distinctive white crown patch.

American wigeons, however, bucked the trend of some of the other prairie-breeding puddle ducks and showed a slight rise in overall numbers. The wigeon breeding population was estimated at 2.8 individual ducks, according to the survey. Wigeons beat their long-term average, which rests at 2.6 million.

The American wigeon can be found all over North America. Their breeding grounds stretch from Alaska across the tundras of Canada all the way to the Atlantic Ocean. American Wigeons can be found in their wintering habitats from the American Northwest to central Mexico, from the southern prairie pothole region through the Gulf Coast and from New York to the Bahamas close to the Atlantic shoreline. American wigeons are also common winter visitors to Central America, the Caribbean, northern Colombia, Trinidad and occasionally Venezuela

Wigeons are aquatic grazers and forage on grasses and sedges in wet meadows and pastures. The American wigeon’s diet has a higher proportion of plant matter than the diet of any other dabbling duck.

It’s also called the “baldpate” for the same reason our national bird is known as the “bald” eagle. A white patch on the forehead reminded early naturalists of a bald man’s head in much the same way that our national bird earned the term “bald” eagle because of its own white head. Further, the word “bald” is thought to derive from an archaic word in Middle English meaning “white patch,” from which the archaic definition “marked or steaked with white” is drawn.

The origins of the term “wigeon” are a bit murkier. According to Merriam-Webster Dictionary, the first known use of “wigeon” dates back to 1508, and other sources suggest that the term perhaps was derived from a French/Balearic term meaning “a kind of small crane.”

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Photo by Coffee/Pixabay.com • Gadwalls are close relatives of American wigeon.

There are two other species of wigeons — the Eurasian wigeon of Asia and Europe and the Chiloé wigeon of South America. Wigeons belong to the Mareca genus of dabbling ducks, which also includes gadwall and falcated teal.

While female American wigeons produce a rather raspy quacking sound, wigeons more typically produce a vocalization when excited that sounds like “whew, whew, whew.”

Some ducks have become associated with certain bodies of water in the region, and the American wigeon is no exception. In addition to the pond at Erwin Fishery Park, there have been reports of American wigeons this winter from a large pond adjacent to the campus of Northeast State Community College in Elizabethton, Tennessee, as well as on the weir dam at Osceola Island Recreation Site in Bristol. Hooded mergansers have wintered in large numbers at Middlebrook Lake in Bristol. Hundreds of buffleheads have wintered at Wilbur Lake near Elizabethton, Tennessee, for decades. March and April, being periods of transition as winter changes into spring, could bring migrating ducks to the region’s ponds, lakes and rivers. Keep your eyes open and you could be surprised by what you find.

 

 

Many birds plan ahead for times of scarcity

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Photo by Struza/Pixabay.com • A chickadee plucks a peanut from its shell. Chickadees, like many other songbirds, often store food that they can utilize during lean times.

Ernie Marburg sent me an email last month about an article he had read on chickadees that he thought might be of interest. The article’s main focus involved the fact that chickadees are apparently capable of remembering 1,000 cache sites and retrieving food several months after having placed it in various scattered locations.

“Their memories are better than ours,” Ernie wrote. “Mine, anyway.”

Ernie also had a question for me about observations he and his wife have made at their home in Abingdon, Virginia, about birds and the practice of caching food.

“My wife and I have both observed crows taking bread (five or six pieces at a time) in their beaks and flying off and burying it in lawns among the grass,” he wrote. “We have also observed that they march through the lawn apparently looking for such food caches. Is this something that is commonly known? Are we correct in our observation of this?”

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Photo by dbadry/Pixabay.com • Blue Jays often create food caches for acorns and other items. This jay is leaving a feeder with several peanuts thanks to an expandable esophagus.

Experts have indeed noticed this behavior. In fact, it’s fairly well known that crows are methodical in their approach to storing food. Crows, which belong to the corvid family that includes birds such as jays, ravens and magpies, are also highly intelligent animals. Their intelligence shows in the extra step they take after they have buried food. The crow will often take a leaf or twig and place it over the spot where the food has been buried. Experts suspect the bird takes this action to mark the spot and attract attention to the location when they return to look for the buried food.

Birds store food for convenience when they have more food than they can finish, but they also cache food in anticipation of periods such as inclement winter weather when food is likely to become scarce.

The blue jay, a relative of the American crow, is fond of acorns. The jay is so enamored of acorns — a nutrient-rich food for many birds and other animals — and so dedicated to caching acorns that the bird actually helps oak forests expand. A single jay may cache thousands of acorns each fall. Inevitably, some of the cache will be forgotten, to go uneaten and give the acorn the chance to sprout into a seedling in the spring that may grow into a mighty oak in a new stand of oaks.

The jay even has some modifications to help with the storing of food. Blue jays have a flexible esophagus that can distend and allow them to stuff multiple acorns down their throats. Caching food is hard work, so it helps reduce energy consumption if the jay can transport several acorns at a time instead of a single acorn on each trip to a cache site.

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Photo by Anne773/Pixabay.com • A Carolina chickadee visits a feeder for a sunflower seed. Chickadees are a songbird that’s known for storing surplus seeds as insurance against lean times.

Now, back to chickadees for a moment. Research has shown that the brains of black-capped chickadees grow in anticipation of the need to remember where these tiny songbirds cache their sunflower seeds and other foods. The interesting finding is that only the part of the brain associated with memory grows. After all, it doesn’t do much good to store food for a rainy or snowy day if the bird promptly forgets where the food has been hidden.

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This image illustrates an acorn woodpecker’s visit to a food cache. These woodpeckers are famous for storing acorns in dead and living trees, as well as substitutes such as telephone poles.

The acorn woodpecker might qualify as a world-class cacher of food. As the bird’s name suggests, this woodpecker loves acorns. An acorn woodpecker will devote a significant amount of its time to establishing granaries. In this case, the granaries are holes drilled in the trunks of trees (or sometimes in a telephone pole or the side of a wooden building) for the storing of acorns. Some of these trees have hundreds of holes drilled into them with each hole containing an acorn placed there by the woodpecker. The woodpeckers often use dead trees, but they also utilize living trees. Surprisingly, the holes do not seem to affect the health of the trees.

From chickadees and woodpeckers to crows and jays, birds manage to continually surprise with seemingly infinite resourcefulness.

black crow bird

Photo by Pixabay on Pexels.com • The American crow is also known for caching food.