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 ...

Male cardinals are red. Female cardinals are tan. The odd bird that's been roosting outside John and Shirley Caldwell's kitchen in Erie, Pennsylvania, is an even split of both. Divided down the middle ...

Researchers have discovered an extraordinary, vibrantly colored tropical bird with "female" feathers down one side of its body and "male" feathers down the other. Female green honeycreepers ...

When a homeowner in northern Florida looked out at her bird feeders the first weekend in March, she thought she saw a red-headed woodpecker. There was a brown bird nibbling at the wild bird seed with ...

Bilateral gynandromorph green honeycreeper (Chlorophanes spiza) photographed in the wild in Colombia. (Credit: John Murillo.) An “extremely rare” half-female, half-male bird has been caught on film, a ...

Talking about the differences between males and females at a group dinner is a sure-fire way to way to get laughs while treading dangerously. In this PC world, most of us have become gun-shy about ...

Biologists recently made a "once-in-a-lifetime" discovery of a bird that's male on the right side and female on the left. Researchers captured the bird, a rose-breasted grosbeak (Pheucticus ...

This Rose-breasted Grosbeak gynandromorph bird possesses both male and female physical traits, including different colored wing pits. Male Grosbeak have reddish pits, while females have yellow. A rare ...