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endangered species

Saltmarsh Sparrow - Interview with Russ Greenberg

Imagine a heat wave, and your body covered in down and feathers. How do birds cope? Well, Saltmarsh Sparrows use their bills to shed excess heat. Russ Greenberg, head of the Migratory Bird Center of the Conservation Biology Institute at the Smithsonian, explains that these birds' bills convect... read more »

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Topics & Themes:  science

White-throated Swifts

A pair of White-throated Swifts twists and turns, sailing through the air. Dashing headlong across the canyon toward an unyielding wall, the birds disappear at the last second into a slender crevice. This swift is aptly named — and doubly so. The White-throated Swift is among the fastest of all... read more »

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Topics & Themes:  flight

Northern Spotted Owl

A Northern Spotted Owl hoots from deep within a Northwest forest. We know the Spotted Owl best as an unwitting symbol of an ongoing political and economic struggle. We've seen its dark eyes peering from the pages of a newspaper. A Spotted Owl stands about a foot-and-a-half tall. It's adapted to... read more »

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Wilson's Phalarope

If any bird is an anomaly, it's the Wilson's Phalarope. In a birdbook, Wilson's Phalaropes are found among the sandpipers. But they forage while swimming. Spinning like tops, they create an upwelling, pulling food to the surface. The breeding of Wilson's Phalaropes is anomalous, too. Females are... read more »

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Topics & Themes:  breeding display, migration

Northern Spotted Owl II

The plight of the gravely endangered Spotted Owl illustrates the imperiled status of old-growth forest in the Pacific Northwest. More than 90% of that forest is gone, a percentage that dwarfs even the worldwide loss of tropical forests and wetlands. Spotted Owls rely on those ancient trees -... read more »

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Southwestern Willow Flycatcher

Willow Flycatchers nest across the northern two-thirds of the U.S. and southernmost Canada. A subspecies, known as the Southwestern Willow Flycatcher, nests in the Southwest, as far east as Texas. The Southwestern Willow Flycatcher was listed as endangered in 1995. It's just one of 300 bird... read more »

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Topics & Themes:  migration

Aggressive Warblers and Climate Change

The territories of Townsend's Warblers and Hermit Warblers overlap in Washington State. Ornithologists call the overlap where the two species interbreed a "hybrid zone." The hybrids - like the one seen here - reveal characteristics of both. And they may also lend clues about our changing climate.... read more »

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Topics & Themes:  science

Marbled Murrelet - Interview with Martin Raphael

The endangered Marbled Murrelet is a bird of two worlds. Martin Raphael, a biologist with the Pacific Northwest Research Station, explains: "It lives in the marine world. But then it nests on the limbs of large, old trees. Its fate is tied not only to the fate of the trees, but also on marine... read more »

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Long-billed Curlew - Singing over the Grassland

The Long-billed Curlew is North America's largest shorebird, seen here in its breeding habitat, a western grassland. They may be the largest, but they're also among the rarest. Their numbers are declining as arid grasslands disappear. Because curlews depend on very different environments for... read more »

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Topics & Themes:  breeding display, migration

The Drumming of the Ruffed Grouse

A male Ruffed Grouse performs his drumming display on a resonant, fallen log in the shelter of a brushy thicket in the forest. Drumming announces a male's territory and his desire for a mate. Ruffed Grouse thrive in young forests. Wildfires once created that type of habitat. Today, wise forest... read more »

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Topics & Themes:  breeding display, sound

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