That was my thought butI wanted to check

Sounds like the Mallard type hybrid things that hang around there.

Hi everyone I hope you can help me. I am new to this and even though I have scoured my books and the internet I cant find a picture of the two ducks I saw on the spit at Pennington this evening. They were at the end of the spit. both had fully black heads yellow bills and white/mottled chests with fairly evenly dark backs both were Mallard sized. My friend said who did not see them thought maybe tuffted but I know what they look like and they were bigger and had very yellow bills unlike the tufted. Any thoughts would help me stop wondering Thanks John