Gerald S. Wilkinson: 2 ideas worth knowing

2 ideas from Gerald S. Wilkinson, each explained in a minute and credited to the original work. Free on Savvy.

A vampire bat that fails to feed can ask a roost-mate to regurgitate blood for it
A vampire bat starves if it goes two nights without a blood meal, but hunting fails often enough that many bats would die without help. Biologist Gerald Wilkinson found that well-f…
— Gerald S. Wilkinson, Reciprocal Food Sharing in the Vampire Bat
A hungry vampire bat can borrow a blood meal from a friend, and is expected to repay it
Vampire bats can starve within about three days without a blood meal, so a bat that comes home empty will often beg a mouthful from a roost-mate, who regurgitates blood to share it…
— Gerald S. Wilkinson; Gerald G. Carter, Reciprocal Food Sharing in the Vampire Bat

Five ideas worth knowing, every week