For the snowy owl image in this exhibit: information is as follows:

A Snowy Owl (Nyctaea scandinaca) from the Smithsonian's National Zoological Park in Washington, D.C. The Zoo, with more than 3 million visitors annually, promotes awareness of the need to save vanishing animal populations worldwide.
Photo by Jessie Cohen. (c) 1991 Smithsonian Institution.

Other pictures and text copyright 1994 by The Museum of Paleontology of The University of California at Berkeley and the Regents of the University of California.

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