The two years Princeton senior Joe Kawalec spent studying the natural camouflage of the ubiquitous downy woodpecker oddly enough began and ended the same way — tracing the outlines of birds. In ...
The reddish gray-brown bark of the red oak tree with its darker vertical markings is one of the key features to identifying the tree in winter. (Clay Wollney) Leaves are the most useful and frequently ...
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