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Beaks and Grosbeaks Oct 18, 2025

Show notes

Beaks suited for opening tough, hard seeds — thick, conical beaks — evolved in more than one lineage of birds. Rose-breasted Grosbeaks are related to cardinals, which also have powerful beaks. Evening Grosbeaks belong to the finch family, which includes goldfinches and crossbills — an entire family of seedeaters. But both these grosbeaks were named before their family connections were fully understood.

More info and transcript at BirdNote.org.

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Seeing the Rainbow in a Bird’s Feathers Oct 17, 2025

Show notes

We make it a habit to detail the broad and beautiful spectrum of bird colors, but iridescent feathers are undoubtedly among the most mesmerizing. When sunlight hits the Bufflehead’s dark head feathers at the right angle, their colors transform into shades of the rainbow, from deep violet to green and gold. Common Grackles, caught in natural light, gleam gold, green and blue-purple. Starlings, too. And the dull gray Rock Pigeons shuffling around a city park might reveal a glimpse of the electric teal and lavender, shifting shades on their throat.

More info and transcript at BirdNote.org.

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Sister Species: Snow Goose and Ross’s Goose Oct 16, 2025

Show notes

Ross’s Geese and Snow Geese are both white-bodied waterfowl with black wingtips that can be difficult to tell apart. The pair are a great example of what science calls sister species, which occur when a portion of one species takes an evolutionary step away from the rest, resulting in a species split. In this case, genetic studies suggest that the Ross’s Goose branched away from their Snow Goose relatives more than two million years ago, possibly because advancing glaciers separated the two populations. After spending millennia in isolation, the Ross’s Goose evolved to be about ⅔ the size of a Snow Goose, with a noticeably shorter neck, smaller bill, and higher-pitched voice, too.

More info and transcript at BirdNote.org.

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Arizona Woodpecker and the Sierra Madre Oct 15, 2025

Show notes

Found in the Sierra Madre, the Arizona Woodpecker has a special connection to the mountain range. Sharing mid-elevation pine and oaks with fellow border straddlers, these small brown birds with white and brown cheeks stand out from other Woodpeckers with their heavily marked white underparts. Uniquely, they forage by flying to the base of a tree and then spiraling up the trunk. And in courtship, the male turns himself into a paper airplane, holding his wings steady and gliding toward his mate.

More info and transcript at BirdNote.org.

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The 'Grasshopper' Hawk's High-Stakes Migration Oct 14, 2025

Show notes

Swainson’s Hawks make an incredible journey every year, migrating 12,000 miles round-trip from North America’s prairies to Argentina’s pampas. What makes them truly unique is their diet. Most hawks hunt rodents and reptiles, but Swainson’s Hawks switch to insects, feasting on grasshoppers and locusts in South America. In the 1990s, this diet nearly led to disaster when pesticides in Argentina killed over 20,000 hawks in two years. But a successful international conservation effort saved them.

More info and transcript at BirdNote.org.

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Silly Willow Ptarmigan Oct 13, 2025

Show notes

Some bird songs leave us in admiration of their beauty, some with a sense of wonder at their complexity—and others are downright comical. As a maker of silly sounds, the male Willow Ptarmigan beats the Three Stooges hands down. But these sounds are no laughing matter. Where it nests in the shrubby willow tundra of Alaska and Canada, the Willow Ptarmigan crows to attract females and show other males he’s in charge of his territory.

This episode is brought to you by the Tuttleman Foundation with thanks for their generous support.

More info and transcript at BirdNote.org.

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Birds Crossing the Pacific Oct 12, 2025

Show notes

Over 12,000 miles across at its widest point, you might think the Pacific Ocean is a barrier that even high-flying birds can’t cross. Think again – some species make the trip every year as part of their life cycle. During the spring, Bar-tailed Godwits break up their trip from New Zealand to Alaska with a stop in the Yellow Sea off the coast of East Asia. But for their winter migration, they fly from North America to New Zealand without stopping. The longest recorded godwit journey is over 8,000 miles of uninterrupted flight.

More info and transcript at BirdNote.org.

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Migration Routes Evolve Oct 11, 2025

Show notes

Why do birds consistently follow certain routes in their migrations? Pathways of migration evolved, shaped by the wind. During the height of the last ice age, ice-free breeding habitat for songbirds remained in what is now Alaska and parts of Western Canada. Studies of fossil pollen show that consistent winds blew across the continent on a northwest-southeast heading of 155 degrees. Scott Weidensaul recounts in his book Living on the Wind, “A powerful high-pressure center over central Canada pumped strong northwest winds, precisely the conditions that would aid migrants.” The birds rode these tailwinds to traverse the ice fields. And today, the birds still follow this bearing on their migration to South and Central America and the Caribbean.

More info and transcript at BirdNote.org.

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Stand-still Birding Oct 10, 2025

Show notes

While full-speed-ahead birding can mean spotting a large number of species, there's quiet joy in stand-still birding. Pick a place-forest, field, or marsh. Find a seat that's dry, and hold your binoculars to your eyes. Be still and blend in. After perhaps 20 minutes, birds accept you as part of the landscape and go back to the business of being birds. You might even see a bird like this female Anna's Hummingbird fly to her secret nest.

More info and transcript at BirdNote.org.

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A Closer Look at Sparrows Oct 09, 2025

Show notes

At first glance, many of the sparrows in North America look pretty much the same: like small, drab-colored songbirds hanging out on the ground. But these “little brown jobs” can be fun to identify if you know what field marks to look for!

More info and transcript at BirdNote.org.

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