![KQED's Perspectives show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/013/553/small/kqed-perspectives.jpg)
Summary: Michael Ellis looks at one California critter among the very few that migrated north in the Great American Exchange.
Summary: Michael Ellis looks at one California critter among the very few that migrated north in the Great American Exchange.