Geese and ducks are unable to breed. Though a duck and a goose may attempt to mate if left together, it will not result in hybrid offspring.
While it may not be possible to interbreed ducks and geese, waterfowl still account for more hybrid species than any other type of bird.
The most common duck hybrid is a cross between a Mallard and a Pintail.
A common hybrid found among geese is the combination of Snow Geese and Specklebelly, which can be found in arctic areas of North America.
Though ducks and geese are not able to breed successfully, they can still live together. Both are social creatures by nature and should get along with no problems.