The Andean Condor is one of the largest flying birds in the world. With a wingspan that can stretch over 10 feet across, the condor doesn’t flap so much as sail, using rising thermals to glide across the Andes for hours. Once revered in Inca mythology as a messenger of the gods, the Andean Condor now graces the coat of arms of Bolivia, Chile, Colombia, and Ecuador. But like many scavengers, condor populations are declining due to threats like lead poisoning and habitat loss.

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Sandhill Crane families form a close bond. A pair of adults might travel north with their young from the previous summer, along with grown-up offspring from several years ago. After the breeding season, families will stick together for the journey south and the winter, even in large flocks. The parents often remain together for the rest of their lives.

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Palmyra Atoll is a ring-shaped island encircling a lagoon in the South Pacific. The atoll lost many native trees due to U.S. military activity during World War II. Conservationists have worked to restore the ecosystem. Seabirds such as Black Noddies and Red-footed Boobies nest in the island’s rainforest. Their guano enriches the soil, and the soil’s nutrients help support the coral ecosystem that provides fish for the birds.

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There are five million bird eggs stowed away in museums across the world — and the study of eggs, called oology, can give us great insight into birds. The link between DDT and the decline of Peregrine Falcon populations was identified in part using museum and personal egg collections, and this evidence helped lead to a ban on DDT. And today, Peregrines can still be seen zipping across the sky.

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Kiwikiu, also known as Maui Parrotbill, used to be found all over Maui and Molokaʻi. Now, fewer than 150 individuals exist and kiwikiu are currently restricted to a tiny region of high elevation forest on the slopes of Haleakalā. A translocation effort to expand their range was unsuccessful due to the rapid spread of mosquito-borne avian malaria.

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Yellow-eyed Juncos sometimes make a migration of sorts — not from north to south, but from the high mountains to the lowlands or the other way around. It’s called altitudinal migration. In the warm summer months, some Yellow-eyed Juncos prefer to nest at higher elevations. In winter, however, the scarcity of food pushes them back down to the valleys.

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Isaiah Scott was in middle school when his family took him to visit the Cornell Lab of Ornithology. He remembers seeing a huge mural showing hundreds of colorful birds spread across a map of the world. That painting, called the Wall of Birds by Jane Kim, got Isaiah curious about how many of those species he might see for himself. In this episode, Isaiah shares how the artwork sparked his love of birding.

There’s more to our conversation with Isaiah Scott in season 4 of Bring Birds Back!

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Sometimes, a species’ song changes over the course of a few decades. But a bird that lives in the mountains of eastern Africa, the Forest Double-collared Sunbird, appears to have kept the same song for at least 500,000 years. That’s the amount of time that two populations of the species split up into two separate mountain ranges. Despite a lack of contact between those populations, they sing a nearly identical song, suggesting that it’s very similar to the one their ancestors sang long ago.

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When the air is thick with wildfire smoke, people are advised to stay home. At Hastings Natural History Preserve in California, Acorn Woodpeckers do the same. These gregarious birds live in family groups and frequently visit their neighbors while foraging. Using tiny radio transmitters, scientists tracked the movements of Acorn Woodpeckers during the summer of 2020 when wildfire smoke blanketed the preserve. On smoky days, woodpeckers spent more of their time at home. And when they did leave their territories, they didn’t venture far and visited fewer neighbors than usual. Published in Current Biology in 2023, the findings suggest that harm caused by wildfires go far beyond the blaze itself. As megafires become more common in our changing climate, even more birds could be affected by wildfire smoke in the future.

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A few times each year, the Eastern Paradise-Whydah puts on his party clothes. This small finch is found in East Africa, and males and females generally share the same nondescript appearance. But when it’s time to mate, the male sprouts extravagant, long, black tail feathers two or three times the length of his body. The feathers make it look like he’s wearing a long black cape, thus the nickname, “widow bird.”

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