Thursday, October 23, 2014

Caspian Tern

This Caspian Tern flew by us at Nisqually National Wildlife Refuge on 19 July 2004. The tern is flying in a typical posture, with its bill pointed downward. When a fish is spotted, the bird hovers and then plunges, often completely going under water. Fish are the Caspian Tern’s main staple.

I have blogged about these terns before; indeed, this observation is my second for the year—the first being on the Texas coast in February. This tern occurs on all continents except Antarctica. In North America, they breed both coastally and in the interior. American Caspian Terns winter south to Colombia and Venezuela. Our populations are increasing, unlike those in Europe and Africa, where they are often rare or extinct (Cuthbert and Wires 1999),

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