For the Birds Radio Program: Evolution of Birds at Feeders

Original Air Date: Dec. 21, 2009 Rerun Dates: Dec. 7, 2015; Dec. 8, 2014; Dec. 26, 2013; Dec. 29, 2011; Dec. 15, 2010

Our feeders provide us a lot of pleasure and can be helpful to birds. They also can affect bird movements, and are even leading species to evolve.

Duration: 5′02″