Looks to me like a regular green frog... not a bullfrog as the ridge of skin goes straight down the back. I see no evidence of the spots that a leopard frog would have. Bullfrogs and green frogs can be hard to tell apart if you can't get close - but leopard frogs and green frogs are quite different so they're not as usually mistaken for one another. He's cute!

I agree about sticking with native frogs. They're going into your pond and will be free to come and go. Non-native frogs may not survive, or may cause problems in the local environment. Yes, larger frogs may eat a few fish, but it is not a major part of their diet. They only eat what they find at or above the surface or in very shallow water. They don't dive for food. They have a pretty simple mode of existence for most of their adult lives. When they see a moving object, they judge whether to hide from it or to swallow it! Tadpoles eat mostly algae. When they are transitioning they eat nothing and live off their tail. The other thing about frogs is that all of them sing at some point in the year. Bullfrogs and green frogs tend to sing throughout the summer. They are also the ones that are most aquatic, and most likely to hang out in the pond rather than wandering off into the woods. Leopard and pickerel frogs stay near the water but like to hunt in grassy areas. Wood frogs breed in one mad rush and then spend the rest of the season in the deep damp woods. Toads will hang out in the garden if they have nice places to hide, like hollow logs or overturned flower pots. Tree frogs and peepers will be heard much more than seen. They sing mainly in the spring, and during wet weather in the summer and fall. For overwintering, some kinds will find places on land, and others will overwinter at the bottom of the pond.

I realize this is an older post but we live on a small farm (we are hay farmers) with creeks, springs, a farm pond and an under-construction koi pond (not yet stocked or ready). I LOVE frogs and toads and we have tree frogs here and I am hoping we will have more frogs and tadpoles when we get our koi pond finished. I picked up a toad the other night and 'petted' him. He curled in a tight, nervous ball and I tried to soothe him and let him go right where I picked him up. Of course, the snakes or various large birds may eat him but I loved him for just a moment!

your post has gotta be a first for the garden web pond forum! i had a hen with the same problem, used vaseline on my rubber-gloved finger and pushed the prolapse back in and all was fine again for her- she even continued to lay eggs. a frog tho?- hmmmm. i donno. maybe IF you can catch it, use vaseline on a q-tip and try to poke the prolapse back in place? i'm very unclear about a frog's personal anatomy tho, so can't imagine if this is even possible. poor thing - nature just might take care of this problem herself but, like you, i would want to help. if you decide to euthanize, maybe wrap it in something soft and put it in a freezer? or drop it in boiling water like we do with innocent but delicious lobsters. both ideas make me sad. min