The Black-bellied Whistlers here in my neighborhood hang out at one quiet residential end of the little park lake. They apparently are enjoying the scratch feed someone (not me) is leaving for them to eat. The bunch includes quite a number of youngsters among that flock. The juveniles have a grey-blue bill, legs and feet. Adults Black-bellied Whistling Ducks have the pink bill, legs, and feet.
This flock shares the lake with Lesser Scaups, Mallards, Mottled Ducks, Muscovy Ducks, Hooded Mergansers, and even a Bufflehead Duck, in addition to a variety of wading birds, Pied-billed Grebes, and geese! Please click on the thumbnail image to see the larger picture. Enjoy!