THE BIRD BOOK 
DIVING BIRDS. Order I. PYGOPODES 
GREBES. Family COLYMBID/E 
Grebes are birds having a ducklike body, but with pointed bills. Their 
feet, too, are unlike those of the Ducks, each toe having its separate web, and 
having a broad flat nail. Their wings are very small for the size of the body, 
making it impossible for them to rise in flight from the land. They rise from 
■the water by running a few yards along the surface until they have secured 
sufficient headway to allow them to launch themselves into the air. After 
having risen from the water their flight is very swift and strong. On land they 
.are very awkward and can only progress by a series of* awkward hops; they 
generally lie flat on their breasts, but occasionally stand up, supporting them- 
selves upon their whole tarsus. Grebes, together with the Loons, are the most 
expert aquatic birds that we have, diving like a flash and swimming for an in- 
credible distance under water. 
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