For the Birds Radio Program: Cassia Crossbills: of pinecones and squirrels

Original Air Date: July 28, 2017 Rerun Dates: July 19, 2019; Aug. 1, 2018

A brilliant ornithologist name Craig Benkman discovered some very important information about Red Crossbills, leading to a whole new species for science.

Duration: 6′15″ Related blog post with transcript