There appears to be an underlying selection mechanism at work among Gouldian finches -- a mechanism that allows this species to produce and maintain individuals with red heads, black heads, and yellow ...

April 23 (UPI) --The heads of Gouldian finches feature one of three different colors: yellow, red and black. Now, scientists know why the pressures of natural selection have failed to erase the ...

A highly endangered rainbow-colored Australian finch is breaking all the rules when it comes to avian evolution, according to new research published today by scientists from CU Boulder, the Cornell ...