Waterfowl are mating in winter and they can be found in huge flocks — sometimes numbering in the tens of thousands!
Seeing great rafts of ducks and geese can be a good antidote for the often extreme temperatures and conditions you need to endure to do it. But seeing hundreds or thousands of birds at one time is possible to do in a variety of places around the US. Bring your binos, camera and a scope if you have one, as in many places the birds will be scattered all over the water and often seem to have a preference for not being close to where you happen to be. Here are a few suggestions of where to find them: