The mallard, for instance, has been known to breed with about 40 other species of waterfowl worldwide. Wood ducks have crossbred with at least 20 other duck species.

This year's survey shows significant increases in breeding populations of both mallard ducks and other duck species.

Check the color of their bill (if you're a mallard duck, that is). Researchers have found that the brighter a mallard's bill, the more effective their sperm is at killing off bacteria.

Two major studies are underway to try to better understand why mallard duck populations are declining in the U.S. Researchers are using new technology to help solve the mystery.

A male Wood duck is spotted earlier this month with his new female Mallard in Central Park, and the two are reportedly finding love. David Barrett of Manhattan Bird Alert “It’s unusual for a ...

While this is certainly tall for a mallard duck — the Audubon Society writes that a male mallard is typically about 24 inches in length — Long Boi is not a mallard duck.

“Migration” - 3.5 stars I grew up watching generations of Mallard ducks living on a pond outside the front door of my rural route home, one reason why this animated comedy really impressed m ...