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 ...

ERIE, Pa. – Longtime birder Jamie Hill knew he'd come across something rare. The Waterford, Pennsylvania, man saw a northern cardinal that appeared to be male on its right side and female on its left.

ERIE, Pa. – Longtime birder Jamie Hill knew he'd come across something rare. The Waterford, Pennsylvania, man saw a northern cardinal that appeared to be male on its right side and female on its left.

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 ...

Researchers believe that the cardinal frequenting the Caldwells’ bird feeder in Erie, Pennsylvania, is a rare bilateral gynandromorph, half male and half female. Not much is known about the unusual ...

This bi-colored northern cardinal has female plumage on its right, and male plumage on its left. Called a “gynandromorph,” these animals are rare in nature. Rarer still is the chance to study one for ...

James R. Hill III has marveled at the feathered animals for 48 years, but on Saturday he saw a 'one in a million' bird with bright red like a male cardinal on one side and brownish white like a female ...

With its body turned to one side, you might not notice anything unusual about the cardinal recently spotted in the backyard of two Pennsylvania bird enthusiasts. But viewed head on, it’s an entirely ...

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Editor's note: Jamie Hill was misidentified in a previous version of this story. Longtime birder Jamie Hill of Waterford knew he'd come across something rare when he saw the northern cardinal that ...