There are also Blue winged teal, Gadwalls, Mallards, Ringnecks, Grebes, Black Ducks,
to help id any you see this is a good source for me:
Waterfowl ID, Duck ID, Duck Sounds, Duck Photos, Goose ID: Ducks Unlimited
There is also a flock of black-bellied whistlers -
Black-bellied Whistling Duck Facts, Figures, Description and Photo
which according to Ducks Unlimited, live on the gulf coast in Texas south - - not a clue how they got here!