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The Grebes
Grebes, although similar to the loons in general structure and economy, have peculiarly lobed and flattened-out toes connected by webs that are their chief characteristic. In the breeding season several species wear ornamental head-dresses, colored crests or ruffs that disappear in the winter months. Plumage, which is thick, compact, and waterproof, has a smooth, satiny texture, especially on the under parts. Wings, though short, are powerful, and enable the grebes to migrate long distances; but they are not used in swimming under water, as is often asserted. The marvelous rapidity with which grebes dive and swim must be credited to the feet alone. No birds are more thoroughly at home in the water and more helpless on land than they. By keeping only the nostrils above the surface they are able to remain under water a surprising length of time, which trick, with many other clever natatorial feats, have earned for them such titles as "Hell Diver," "Water Witch," and "Spirit Duck." On shore the birds rest up-right, or nearly so, owing to the position of their legs, which are set far back near the rudimentary tail that serves as a prop to help support the top-heavy, awkward body.
