In 1869, John Wesley Powell led a small party down the Green and Colorado Rivers in a bold attempt to explore the Grand Canyon for the first time. After their monumental expedition, they told of raging rapids, constant danger, and breathtaking...
This is a preliminary biological assessment of Kirwin National Wildlife Refuge. Stimulation for the report was based on the concept that future decisions related to the biological portion of the Comprehensive Conservation Plan will be based on the...
This is a 30-second mp3 audio clip of a whale "blowing." What do we mean when we say a whale "blows?" While a whale is holding its breath, air is compressed in its chest. Upon reaching the surface, the air is exhaled through the...
Presented by Christopher Horsch, USFWS. February 2010. - This presentation draws from the work done by others, notably Dr. Richard Wolfson, Middlebury College, the late Dr. Stephen Schneider, Stanford University, and Dr. Stephen Miller, USFWS.
