Here's one reason I don't use my dogs snipe hunting. This photo was taken while snipe hunting in February, 2012. Pretty big ricefield lizard.
The universal small birdie choke combo is 1/4-1/2 aka skeet/IC and Modified. With respect to large reptiles they have found 14+ft American Crocodile in the Everglades. That is well into man devouring category so actually your situation could be a whole lot worse. I'm not sure how aggressive such beast is in comparison to saltie or African Nile ones, but I sure as hell would not want to find myself bird hunting or fishing near one.
