Here's a pretty fellow.
---------- Post added 05-04-16 at 09:02 PM ----------
Originally posted by Venom3300 Do female mallard ducks also do this? I saw a female mallard today with at least 15 maybe 20 babies with it. I couldnt help but to think that there was no way they could all be hers.
15 is a lot for a mallard, the brood size being given in my quick source as one to 13, However the record brood size for a mallard is 24(!), so 15 eggs incubated by one mallard hen is within reason. I have not found any description of mallard females taking in stray offspring, but my personal impression is no, they do not. I can recall watching more than once a female mallard attacking what seemed to be a stray duckling obviously different in size from her own. I'll try checking a bit more.
After some more searching: Apparently many ducks will adopt offspring not their own with two things commonly being critical 1) the duckling entering should be very near the same age as the hen's own brood; 2) generally the younger the ducklings the more likely the adoption will be successful. These observations were made following human attempts to integrate a "stray" duckling into the brood of a hen with young. Whether it happens naturally, as it does with eiders, is unclear for mallards and other duck species.