Based off this photo, I would guess three fawn and white runners (looks like two drakes and a hen). I am a total novice, I just happen to have that exact breed and I noticed that my drakes tend towards having very orange bills while the hens do not. White looks like a pekin. I have zero experience with them. Black looks like a Cayuga and I would guess a hen based on the black bill. My male Cayugas usually sport grey bills.
The brown fellow appears to be a Rouen drake. Green head and white ring coming in. He looks too heavy to be a Mallard.
Those are my crappy guesses! Have they found their voices yet?
That green head ...
