Portland Press Herald
| by Herb Wilson

Herb Wilson, the Leslie Brainerd Arey Professor of Biosciences, wrote a birding column for the Portland Press Herald titled “Why do grebes eat their feathers?” Wilson starts off with a description of grebes, their characteristics and behaviors. He then cites a recent paper that “provides a definitive study of the functional significance of feather-eating in grebes,” which aids their digestion. The study “suggests the main function of feather-eating is to delay the movement of food into the intestine until chemical digestion is complete,” he writes in the Dec. 10 article.

Read full article