Dein Suchergebnis zum Thema: Depression

Searching for the Invisible, Invincible Peruvian Tern | Smithsonian’s National Zoo and Conservation Biology Institute

https://nationalzoo.si.edu/center-conservation-sustainability/news/searching-invisible-invincible-peruvian-tern

On Peru’s pacific coastline, where desert meets sea, lives one of the least studied and most at-risk birds: the Peruvian tern. This bird’s desert camouflage makes it almost impossible to track, but that’s exactly what our team set out to do.
Trained eyes and determination helped us detect the subtle circular depression in

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A Quack-filled Roll Call: Meet the Ducks of the Bird House | Smithsonian’s National Zoo and Conservation Biology Institute

https://nationalzoo.si.edu/animals/news/quack-filled-roll-call-meet-ducks-bird-house

On March 13, the newly renovated Bird House’s doors will flap open, welcoming guests with a chorus of chirps, tweets and quacks. Yes, quacks! Get to know the 11 lucky duck species in the Bird House from animal keeper Jen Ferraro.
After several days of searching, she builds her nest by scraping a depression in

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Tennessee warbler | Smithsonian’s National Zoo and Conservation Biology Institute

https://nationalzoo.si.edu/animals/tennessee-warbler

This tiny, yellowish-green songbird sings a three-note series of accelerating chips. Despite its name, these warblers do not breed in Tennessee, and only pass through the state as they embark on their seasonal migration to their breeding grounds in Canada’s boreal forest. 
Females often build nests in boggy ground, hidden in small depressions among bushes

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American oystercatcher | Smithsonian’s National Zoo and Conservation Biology Institute

https://nationalzoo.si.edu/animals/american-oystercatcher

This eye-catching shorebird is native to the Atlantic and Pacific coasts of the Americas. True to its name, the American oystercatcher feeds on oysters, saltwater mollusks, shellfish and other marine invertebrates, using its thick red bill to jab at shelled prey and pluck the contents from within.
Their nests, called scrapes, are shallow depressions dug into the ground that are

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Black-necked stilt | Smithsonian’s National Zoo and Conservation Biology Institute

https://nationalzoo.si.edu/animals/black-necked-stilt

Black-necked stilts are a tall, medium-size shorebird with black-and-white coloration, long pink legs, a long neck, and a straight black bill. They spend most of their days gracefully darting along shorelines and wetlands and wading in shallow water. 
The nests themselves are formed by making small depressions in the ground and lining

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Hartmann’s mountain zebra | Smithsonian’s National Zoo and Conservation Biology Institute

https://nationalzoo.si.edu/animals/hartmanns-mountain-zebra

Native to the rocky slopes and arid plateau areas of southwestern Africa, Hartmann’s mountain zebras are large herbivores known for their black and white-striped coats. Hartmann’s mountain zebras are a rare subspecies of the mountain zebra, which is one of three types of zebras.
After the zebras leave the area, the shallow depressions left in the ground become

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