This is my bullfrog friend, Leo. I raised him from a tadpole. We weren't sure he survived the draining of the pond (it had sprung a nasty leak in late winter) and the recent replacement of the pond. We found him hibernating in the leftover debris just under the pond.  We placed him ina fish tank with a mesh lid until we could fix the pond. One day when I went out to change out the water in the tank and put fresh 'food' and debris in the tank he was gone. Naturally, I was worried he had died so I poured out the tank and went through the debris with a fine tooth comb.  He simply was not there. Today as I was putting the new fish in the new pond there he was staring in stillness waiting for his next meal. Whew.. so glad he's okay.