are these Mallards

[fireguy1217]

I have had chickens for years but I bought 4 ducks the other week and my dad has raised ducks for a good many years I was told they were Mallards when I got them but my dad says otherwise just wonted some input on them being Mallards or not

 

[Bills vs Beaks]

Im lookin at those and Im thinkin rouens and maybe a welsh drake (the drake in the middle). They look a little big for mallards

 

[buff goose guy]

Possible production Rouens