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Not your average birdwatching page. 🦉
Daily reels uncovering nature's strangest avian secrets.
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57

17 days ago

This bird's brain is upside down. The American woodcock hunts worms by stabbing its bill into the mud — so its eyes migrated to the back of its head, giving it nearly 360-degree vision without turning. To make room for those eyes, its brain flipped upside down and its ears ended up in front of the eyes. Video: Rhododendrites, CC BY-SA 4.0, via Wikimedia Commons. Photos: Rhododendrites, CC BY-SA 4.0; Rodney Campbell, CC BY 2.0; Fyn Kynd, CC BY 2.0, via Wikimedia Commons. #americanwoodcock #timberdoodle #birdbiology by @birdfactfiles

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19 days ago

This owl keeps pet snakes.

Eastern screech-owls do something no other bird does: every prey item arrives at the nest dead — except the tiny Texas blind snakes, which arrive alive. They burrow into the nest debris and eat the parasitic fly larvae that feed on helpless chicks, and the chicks raised with live-in snakes grow faster and die less often.

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Photos: OptimusPrimeBot (public domain), Peter K Burian (CC BY 4.0), Rhododendrites (CC BY-SA 4.0) via Wikimedia Commons; Wormsoft98 (CC BY 4.0), Steveprutz (free use) via Wikimedia Commons (blind snake photos); Brenda Ladd / cliftonladd (CC BY 4.0) via iNaturalist (nestlings). Music: "Spirit in the Woods" by Alejandro Magaña (A. M.) via Mixkit (free license).

#easternscreechowl #megascopsasio #birdbiology by @birdfactfiles

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16 days ago

Nobody knows why this bird dances.

The American woodcock rocks its whole body back and forth as it walks, head held still — and science has two competing explanations and no proof for either. It might be shaking worms loose in the soil. It might be telling predators it has already seen them.

They're moving through Ohio right now — peak migration runs mid-October to early November, so this is the week to watch for the dance.

Send this to someone who likes settling arguments. This one isn't settled.

Worm-shaker, or "I see you"? Which theory wins?

#americanwoodcock #timberdoodle #birdbehavior

Video: Rhododendrites (CC BY-SA 4.0) via Wikimedia Commons by @birdfactfiles

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2 days ago

This father makes milk from his flesh.

Pigeons and doves feed their chicks crop milk — living cells shed from the lining of the throat, driven by prolactin, the same hormone behind mammalian milk. Both parents make it, and it runs about 60% protein to a cow's 3. Flamingos take it further: their crop milk is bright red, and parents pour so much pigment into it they fade to white raising a chick.

Photos: Azorengimpel (CC BY 4.0), Noblevmy (CC BY-SA 3.0), Alexis Lours (CC BY 4.0), Andy Morffew (CC BY 2.0), Robin Müller (CC BY-SA 3.0), Kongkham6211 (CC BY-SA 4.0), via Wikimedia Commons.

#cropmilk #pigeon #flamingo by @birdfactfiles

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3 days ago

It commits infanticide between songs.

The house wren wages war on every bird in its territory. It slips into unguarded nests and pierces the eggs with its needle beak — chickadees, bluebirds, tree swallows, nobody's clutch is safe. Then it stuffs every cavity with dummy nests so no rival finds a home. And the tactical genocide works: it's the most common cavity-nesting bird on the continent.

Photos: Rhododendrites, Paul Danese, and WanderingMogwai (CC BY-SA 4.0); gailhampshire (CC BY 2.0), via Wikimedia Commons; S. King / US National Park Service (public domain).

#housewren #troglodytesaedon #songbird by @birdfactfiles

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4 days ago

Born with a crooked face. On purpose.

Forecasters say red crossbills are pouring into the Northeast this winter.

That bill isn't a deformity. It's a pry bar. She bites between the cone's scales... slides in... and twists. The crossed tips lever the scales apart.

Then a thick, barbed tongue darts in and scoops out the seed. Crossed bills pull seeds three times faster than straight ones.

And they breed on food, not seasons. Big cone crop in January? They nest in January.

#redcrossbill #crossbill #winterfinchforecast by @birdfactfiles

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5 days ago

He proposes with a berry.

The cedar waxwing's courtship is a back-and-forth berry pass — beak to beak, over and over, until one of them finally swallows it. No other songbird does this. And sometimes the gift isn't a berry at all: insects, flower petals, and sometimes the dance leads straight to mating.

Photos: Jocelyn Anderson (used with credit); Andrew C, CC BY 2.0, via Wikimedia Commons; Nick Chill. Video: Paul Danese, CC0, via Wikimedia Commons. #cedarwaxwing #birdcourtship #birdbehavior by @birdfactfiles

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6 days ago

This bird wears its résumé.

Those red seals on the cedar waxwing's wings aren't wax at all — they're astaxanthin, a pigment pulled from red fruit. And you can read them like a badge: a young bird wears just a few, while an old bird wears nine or more. More seals means older mates, earlier nests, and more young.

Photo: Jocelyn Anderson. #cedarwaxwing #bombycillacedrorum #waxwing by @birdfactfiles

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7 days ago

This bird gets drunk on berries.

The cedar waxwing eats almost nothing but fruit — and with no crop, berries pile up in its throat and ferment into alcohol. Its liver is enormous, about five percent of its body weight, and usually burns it off... until the feast is too big and the whole flock gets tipsy. The price of a fruit-only diet.

Photos: Andrew C, CC BY 2.0, via Wikimedia Commons; Nick Chill; Paul Danese, CC BY-SA 4.0, via Wikimedia Commons. #cedarwaxwing #bombycillacedrorum #birdbiology by @birdfactfiles

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8 days ago

These ducklings jump out of trees.

The wood duck nests in tree cavities up to 60 feet high — five stories up. A day after hatching, the mother calls from the ground below, and her flightless chicks leap out: so light and downy they drift down like seeds and bounce off the leaves unhurt. Nesting high keeps raccoons away from the eggs; the price is every chick surviving the fall on its first day alive.

Photos: Mike Lentz; Rhododendrites, CC BY-SA 4.0, via Wikimedia Commons. #woodduck #aixsponsa #birdbiology by @birdfactfiles

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9 days ago

This blue is made of black.

The blue jay carries not a speck of blue pigment in its feathers. That luminous blue comes from a microscopic sponge of keratin and air that scatters only blue light — layered over black melanin that drinks in every other color. Take away the black, and the blue vanishes with it.

#bluejay #structuralcolor #featherfacts by @birdfactfiles

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10 days ago