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At dusk, in the far western reaches of Alaska鈥檚 Aleutian chain of islands, thousands of tiny Whiskered Auklets fly in to nest in cavities deep in rock crevices.
Whiskered Auklets are miniature relatives of puffins and murres. Charcoal gray, they're about eight inches long and owe their name to the long, slender white plumes that sprout from their heads each summer. They end up with rows down the side of the face and a third set that stands like antennae above their eyes. These fancy white plumes very likely play a visual role in courtship and mate selection. But they're not just for show.
Scientists have recently learned that the auklets鈥 鈥渨hiskers鈥 have an important sensory function, too. When the birds enter their cliff-side nest cavities, they find themselves in utter darkness. The 鈥渨hiskers鈥 enable the auklets to feel their way along in the dark. Much like the whiskers of a cat, they're acutely sensitive.
By summer鈥檚 end, when nesting is done, Whiskered Auklets return to life on the open sea, like many seabirds. And with no dark crevices to navigate and no mates to impress, they molt their multi-purpose whiskers. Until next spring.
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Bird sounds provided by The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology, Ithaca, New York. Whiskered Auklet recorded by S S Seneviratne. Ambient sounds recorded by Gordom Hempton of Quiet Planet.com. BirdNote鈥檚 theme music was composed and played by Nancy Rumbel and John Kessler.
Producer: John Kessler
Executive Producer: Dominic Black
Written by Bob Sundstrom
漏 2015 Tune In to Nature.org June 2015 Narrator: Michael Stein