Male and female birds are often quite different. Looking at two individuals of radically different color, it’s sometimes easy to forget this. I often talk to people who think they have multiple kinds ...

A striking and extremely rare half female, half male bird has been spotted by a University of Otago zoologist. Sesquicentennial Distinguished Professor Hamish Spencer was holidaying in Colombia when ...

Researchers have spotted an “extremely rare” green honeycreeper in Colombia that’s half female and half male. The bird’s plumage is divided directly down the middle, with blue feathers typical of ...