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Nervous Cormorants

“It is not entirely clear why cormorants are such prodigious vomiters. Like many birds, they feed their young regurgitated fish, but they also vomit when approached by predators — perhaps to drop weight in preparation for flight, but possibly also to distract their predators. There is also, said John Waldman, a Queens College biology professor and Mr. Grubel’s thesis adviser, the ‘nervousness theory’.”

NYT: Like Ducks and Penguins, With Nervous Stomachs