Bob Harris soundtracks your New Year's Eve and pays tribute to Johnnie Walker.

But this European species makes its marathon journey a little... Bats catch a lift from storm winds on long-distance migrations Historically, bat migration has been a bit of a black box.

Historically, bat migration has been a bit of a black box. While scientists have learned lots about how birds migrate, the handful of bat species that make long-distance journeys have been tougher ...

Historically, bat migration has been a bit of a black box. While scientists have learned lots about how birds migrate, the handful of bat species that make long-distance journeys have been tougher to ...