Snapping turtles are the worst of preds in water. other than may an alligator. Even large mouth bass are said to eat ducklings and gosling when tiny.Hopefully you got all those turtles now... I didn't realize turtles were even a threat. Pretty neat both girls took on nest duty. I love how family oriented geese are. I'm new to owning both ducks and geese so I have a lot to learn!
I looked up pictures of Male and female Pilgrim Goslings on line I see the difference now.
Geese are such a delight to own I think your boys will be happy with you and I hope you enjoy many years with them. To me learning is experience so we learn along the way as we read on here and live with these birds.