BirdNote Daily

Chickadees are tiny songbirds named for their characteristic song and there are seven species found in North America. You'll find the Black-capped Chickadee across the northern U.S. into Canada. The Carolina Chickadee holds sway in the Southeast. Hear the husky voice of a Mountain Chickadee in the Rockies. Travel to Canada for the Boreal Chickadee. This Chestnut-backed Chickadee calls the Pacific Northwest home. The Mexican Chickadee just nudges into southeast Arizona. And the Gray-headed Chickadee turns up north of the Arctic Circle. Which of these chickadees sings near you?

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Sapsuckers drill small holes in the bark of favored trees, then return again and again to eat the sap that flows out. And hummingbirds, kinglets, and warblers come to the sap wells to eat the insects trapped in the sap. Although a sapsucker (like this Red-breasted Sapsucker) may suck a tree's blood, so to speak, the drilling usually doesn't damage an otherwise healthy tree.

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Most of the bird sounds you hear on BirdNote come from the Macaulay Library, a vast collection of over one million bird calls and songs curated by the Cornell Lab of Ornithology. The library relies on both professional field recordists and dedicated volunteers to capture the sounds of birds all over the world.

Support for BirdNote is provided by Marjorie and Ed Ringness from Seattle, Washington — and generous listeners around the world. 

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Before the high-tech gadgets used to track bird migration today, there was moon-watching: a technique dreamed up in the 1940s by ornithologist George Lowery. Using telescopes pointed at the moon to see the silhouettes of migratory birds, Lowery helped show that birds regularly migrate across the Gulf of Mexico and organized the first continent-wide survey of migration in North America. Learn more about the history of bird migration research in Rebecca Heisman’s book Flight Paths: How a Passionate and Quirky Group of Pioneering Scientists Solved the Mystery of Bird Migration.

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Corvids, like crows and jays, are known for caching seeds instead of eating them immediately. Sometimes, those seeds take root before the birds return. Mario Pesendorfer, a forest and behavioral ecologist at BOKU in Vienna, says that’s what happened on Santa Cruz Island in southern California. It’s part of Channel Islands National Park where native shrub oak habitats were largely decimated by grazing livestock. After these animals were removed in the 80s and 90s, Santa Cruz Island regained vegetation faster than its neighbors — thanks to seed-dispersing Island Scrub-Jays! It’s just one example of how birds could help restoration ecologists regrow forests around the world. Learn more about restoration ecology in the latest season of Bring Birds Back!

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The stars appear to rotate in the sky, raising the question of how birds can use stars to navigate during migration. Ornithologist Stephen Emlen brought Indigo Buntings to a planetarium, tracking their movements as the simulated night sky changed above them. The buntings oriented themselves using star patterns that appear to rotate the least — especially the North Star, Ursa Major and Cassiopeia.

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Today is the Autumnal Equinox, when the sun crosses the equator and day and night are of approximately equal length across the globe. In her poem ‘Utsuroi’, writer Lee Ann Roripaugh reflects on how, as the days grow shorter, the remaining light feels that much more beautiful.

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Nature educator Johanne Ryan shares her observations of Southern Lapwings, shorebirds that make their nests on the ground in open areas and vigorously defend them. If a potential predator approaches, the parent will sound a piercing alarm call. If that doesn’t work, the lapwing will charge the opponent, using a secret weapon – sharp, bony spurs on the bird’s “wrists.”

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Author Kira Jane Buxton loves crows — so much that she’s written two novels about a crow named S.T. navigating the extinction of humanity. When she was writing those books, she tried befriending the crows in her neighborhood and wound up bonding with a pair of them. She named them T and Dart. T, the female, is clumsy and playful. Dart, her mate, is more aloof towards Kira but always shares his food with T. This crow couple helped inspire the fictional crows in Kira’s books.

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Williamson's Sapsuckers nest in western mountain forests. The radically different plumages of the male and female so confounded 19th-century naturalists that, for nearly a decade, the birds were thought to be of different species. Sapsuckers are unique among woodpeckers in drilling neat rows of tiny holes — or sapwells — in the trunks of trees. The sap provides food for the sapsuckers and snags small insects that are eaten by hummingbirds and warblers.

More info and transcript at BirdNote.org.

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