How Do Bats Know When It Is Dark ?

jbreed at jbreed at
Mon May 8 11:18:12 EST 1995

Dear All,
Given the expression, "as blind as a bat", and the nocturnal habits of
bats, my question is "How do bats know when it is dark ?". Do they have
vestigial or rudimentary sight ?
Many thanks.

More information about the Bioforum mailing list