I know this might sound like an April Fool's joke, but it's not: In 1999, a biologist named Bruce Bagemihl wrote a book called "Biological Exuberance", where he identified 478 different species of animals that have been observed having GAY SEX. That includes:
Horses
House Flies
Emus
Giraffes
Cheetahs
Sea Otters
Sperm Whales
A type of primate called the Mustached Tamarin
AND MY FAVE TWO..
A type of bird called the Black-Rumped FlamebackAnd another type of bird called the Guianan Cock-of-the-Rock
buy bruce's book