Posted by Carole Berney on December 15, 2007

Q: I've been seeing male mergansers displaying in many different ways for the females, and here it is, only December! When the males raise their crests, or throw their heads back, are they trying to impress a potential mate, so as to pair up for spring breeding season? I always find it surprising to see ducks in their breeding plumage as early as late fall, when they won't breed until spring. Please shed some light on this! Thanks for your terrific resource! Carole Berney

Habitat: stream/river

State: Massachusetts

Habitat: stream/river

A: From your photos and description, I'd say the male mergansers are indeed trying to impress females with their courtship behavior. Although the females look totally disinterested, they're taking it all in. I agree with you that it sounds strange for the ducks to be courting now but this is typical behavior during the winter months. Most of the ducks do their pair bonding during the winter so what you're seeing is normal. Apparently, there are more males than females in a typical duck population (females have higher mortality) and courtship at this early time allows females to choose the "best" mates. Once the weather begins to improve in the spring, the birds are already paired and ready to begin family life.

Hope this helps with your question and thanks for asking.

John Wiessinger ( December 15, 2007)