They share the bay with thousands of coots, pochards, and other ducks. Most commonly found are Eurasian coots, Mallard ducks, herons, pochards, and mute swans. These pochards then migrate south to winter in warmer climates. This is thought to occur because some younger, inexperienced redhead females parasitize other pochards. All pochards have similar diets that include both plant and animal materials. In addition, pochards have a lobed hind toe. Rosy-billed pochards are highly sociable ducks and may congregate in flocks of thousands of individuals. Pochards breed in much of temperate and northern Europe and across the Palearctic. Pochards are superficially similar to the closely related North American redhead and canvasback.