Kevin Omland, a biology professor at the University of Maryland, Baltimore County, stands below a highway overpass towering above a wooded stream valley in the Patapsco Valley State Park, just southwest of Baltimore.  He aims his binoculars up at a scraggly nest of sticks that ravens built in the steel beams beneath Interstate 195. 

<p>Kevin Omland, a biology professor at the University of Maryland, Baltimore County, stands below a highway overpass towering above a wooded stream valley in the Patapsco Valley State Park, just southwest of Baltimore.&nbsp; He aims his binoculars up at a scraggly nest of sticks that ravens built in the steel beams beneath Interstate 195.&nbsp;</p>

The Environment in Focus, hosted by Tom Pelton, is a weekly perspective on the issues and people changing our natural world.  Pelton is a national award-winning environmental journalist, author, and public radio host.

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