The one in the back is a buff or buff mix. The very dark one may be a cayuga I can barely see it. The others appear to be mixes, also, the one on the right looks like a Khaki Campbell mix, the one on the left may have some runner in there.
The back one appears to be a buff hen. Left is probably a cross drake, probably Buff with maybe some Harlequin or Appleyard..? Can hardly tell if on the right we have 2 ducks, or one duck with a light head and dark rear and some shadows.. If the latter, I'd say that is definitely a mutt duck. the front part of her looks Saxony. They're all beautiful!