posted by bleary at 8:48 PM on October 24, 2010 [3 favorites]
Crows sometimes sprawl out around the mounds of acid-producing ants. This craziness, or "anting," is a crow's version of an insecticide application. Anting crows grab ants with their beak, crush them, and wipe the natural oils across the underside of their wing feathers. Formic acide and pungent anal fluids squeezed from ants ahve insecticidal properties that may drive unwanted parasites from the bearer's body. During anting, live ants may also crawl on crows and actually eat some of the tiny troublesome creatures out of a beak's reach. [...]
In the Company of Crows and Ravens
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posted by ardgedee at 1:47 PM on October 24, 2010 [9 favorites]