Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Grandidier's free-tailed bat:

"

A ring species occurs when two populations that are connected by a geographic ring of populations that can interbreed but do not interbreed despite living in the same region. Upon migrating to the Comoros, Grandidier's free-tailed bat and C. pusillius became sympatric. There is evidence of isolation between the two populations further restricting gene flow.[citation needed]