Help identifying some ducks near me

Hey all, I have a wilderness lake near me and i love all the ducks there but there's a few there that don't look like your regular mallards, I'd love to know what they are so any help would be greatly appreciated.

The last three tower over the other mallards and stand more upright which make me think they might be different.

Thanks :)

Holly

  • The birds in the top photo have small curly tails which usually denote some Mallard in the genes, The middle ones may be crossbreeds I'm not sure and the ones standing upright may be a form of Runner of which there are many

    Pete

    Birding is for everyone no matter how good or bad we are at it,enjoy it while you can