Sitting on the seed tray of the backyard birdfeeder was a bright yellow bird the size and shape of a big male cardinal. Short ...

This bird was discovered by Shirley and Jeffrey Caldwell at their backyard bird feeders in Pennsylvania in late January 2019. (Credit: Shirley Caldwell.) Shirley Caldwell ...

began studying a cardinal with a similar split down the middle. Over the next two years, he made more than 40 visits to the backyard of a retired high school biology teacher whose bird feeder had ...

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 ...