These sunbirds keep singin' their song (VIDEO)
Caption
Sky-island populations of East African double-collared sunbirds have been isolated from one another for hundreds of thousands if not a million years, but still look very similar. While almost indistinguishable in plumage, however, some of these bird lineages have altered their songs a lot while others have not — their songs differ little from the songs of related populations they’ve not encountered for millennia.
Credit
Video by Roxanne Makasdjian and Alan Toth, UC Berkeley; audio courtesy of Jay McEntee, Missouri State University; sunbird video clip courtesy of Oliver Fowler
Usage Restrictions
Sunbird video clip cannot be used without authorization of Oliver Fowler
License
Original content