Every evening at sunset, a quarter million Mexican free-tailed bats leave their home underneath the Yolo causeway and go searching for food. If you act fast, you can get a ticket for the Yolo Basin Foundation’s popular bat tours to watch the spectacle. You’ll also learn a lot about bats. The organizer of the tours is Corky Quirk, the founder and executive director of Northern California Bats (aka NorCal Bats), a Sacramento-based nonprofit organization dedicated to the rescue, rehabilitation and release of bats. She joins us to talk more about the winged mammals that call the causeway home for the summer.