Glenn Perrigo: Blackbird Density
The Winter 2010-11 media panic regarding "strange" die-offs of blackbirds, grackles, and starlings is a real yawner to most ornithologists. How could birds be subject to such mass mortality regarding collisions, poisoning, hailstorms, blunt trauma, fireworks, shotgun blasts, wind vortices, thunderstorms, disease, etc? The answer, of course, is density!, Density!, DENSITY! During the day, a hunting Cooper's Hawk is the avian equivalent of yelling fire in a crowded theater. Imagine the potential for disaster during darkness. Super-massive flocks have been fairly common in the Riviera area of Kleberg County during the Fall of 2010.

— Glenn Perrigo, Riviera, TX, Jan. 2011
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