Every once in a while, a genetic anomaly will occur in the animal world that blows scientists’ minds. Take, for example, the exotic bird in the image above. It’s “gynandromorphic,” which means a ...

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 ...

The highly unusual "semi-identical" Australian twins reported last week are the result of a rare event. It's thought the brother and sister (who have identical genes from their mother but not their ...

Bird banders in Cook Township banded a one-in-a million bird — a rose-breasted grosbeak with half its body looking like a male and the other half, a female. The bird was banded on Sept. 24 at Carnegie ...

Thanks to the developmental fusion of male-female bird twins into one individual, this northern cardinal is half red and half tan -- split lengthwise down its middle -- and is half male and half ...

An "extremely rare" half-female, half-male bird has been caught on film, a sighting that has only been made once more than 100 years ago. Zoologist and professor at the University of Otago in New ...

Among birds, females often rule the roost. Not only do females frequently take control in the selection of a mate and over nesting activities, but several female birds also are larger and more ...

When North American ornithologists hear a bird singing, they're likely to assume it's a male. But in many species, the females sing too -- researchers argue that a better understanding of these ...

Source: fir0002, via Wikimedia Commons. Traditionally, birdsong has been viewed as a male trait, and this bias has dominated research on the behavior. “For a long time, scientists thought that female ...