Скачать или смотреть Snippet: Baby hoatzin bird climbs with wing claws

The hoatzin—a bird usually noticed for its fancy hairdo and funky odor—is also unusual in a more subtle way: It has tiny claws on its wings. Most bird species have lost this ancestral feature, and that makes the hoatzin a good place to look for understanding the transition from walking to flying. In this video, you can see how nestlings’ outsized feet and small claws are used in an alternating pattern to climb, but when they swim these birds are able switch to different coordination styles.

CREDIT: A. ABOURACHID ET AL. SCIENCE ADVANCES, 2019

Read the study (free): https://advances.sciencemag.org/conte...

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