how can you tell the sex of swans. we have a pair male & female . they had ababy about three years ago we have not been able to survive any since. the are so mean to the 3 year old i wonder why it does'nt fly away. i have been try to fiqure out the sex her feet are lighter in color like the other female, the males feet are more black. i would like to get a friend for the cast out swan. but wonder if they would get along the just roam aroung our place we have a two sided pond and the pair won't even let the one on their side or let it come by them.