Mallard / Grey
A variant of Call Duck (Anas platyrhynchos domesticus)
Representative Call Duckphoto — a dedicated image of this exact morph isn't available yet.
The wild-type pattern in miniature: green-headed drakes with claret breast, females in mottled brown — the ancestral Call colour.
Keeper tips for this variant
Drakes only colour up fully after the first eclipse moult, so don't judge a young grey Call's markings until it is past its first autumn.