It’s all about access to getting food. They get nectar from flowers. These females that look like males are essentially ...

Female birds sing. That is one conclusion of our 2020 study on one of the most abundant, widespread, well-studied bird species in the world: the barn swallow. Despite the well over 1,000 scientific ...

In Rector, Pa., researchers have spotted one strange bird. This rose-breasted grosbeak has a pink breast spot and a pink “wing pit” and black feathers on its right wing — telltale shades of males. But ...

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 ...

Female birds sing. That is one of the revelations of our 2020 study on one of the most abundant, widespread, well-studied bird species in the world: the barn swallow. Despite the well over 1,000 ...

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.

It may not be one in a million, but it’s pretty close. Researchers have discovered a rare songbird that is male on one side of its body, and female on the other. It’s being described as a “once in a ...