Flattening the crests or whiskers of auklets makes the birds 2.5 times more likely to bump their heads in the dark.
Flattening the crests or whiskers of auklets makes the birds 2.5 times more likely to bump their heads in the dark.
Flattening the crests or whiskers of auklets makes the birds 2.5 times more likely to bump their heads in the dark.