CHAPTER XXV
UNORTHODOX ATTITUDES
WHEN I saw eider-ducks eating seaweed off the coast of my island I was aware that they were doing something which they had no business to be doing; for it is stated in works of authority that they are purely animal feeders. I have had misgivings, therefore, ever since making the observation, but now, having seen a black guillemot also eating a piece of this same brown seaweed, I feel more comfortable about it, for surely this bird should be as exclusively a fish-eater as the eider-duck is supposed to be a devourer of shell-fish, crustaceans, etc. It was certainly, I think, a piece of this seaweed—short, brown, bunchy, and covered with little lobes—that this particular bird had in its bill. Through the glasses I could see it distinctly, and most distinctly it swallowed it. I doubt myself if there is any bird that feeds exclusively on anything, or that is absolutely confined to an animal or vegetable diet. They seem ever ready to enlarge their experience according to their opportunities of doing so, thus illustrating one of Darwin's most pregnant remarks.
When this "tysty" dived it presented a beautiful appearance under the water, owing to the snow-white patches on its wing-coverts, which flashed out dis-
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