No for geese:
Rhubarb leaves, potato leaves, green potato skins, tomato plants, eggplant plants. They probably won't eat asparagus ferns, but I don't think they are actually harmful
They like corn plants, but limit because of the amount of long stringy fiber. You don't want to fill the crop with it.
I'm sure there are a lot of ornamental plants that are not safe, but those are the ones I can think of from the veggie garden. I give all sorts of fruit. Watermelon and softening apples are the number 1 favorites.
Because onions and garlic aren't good for dogs, I don't give them to my birds, although I have absolutely no idea whether they are bad for the birds or not. Also, it is possible that they might flavor the eggs. (haven't tried it)
Chocolate and cocoa hull mulch have killed dogs, cattle, and horses. I don't know if they are bad for birds or not, but I wouldn't risk it.