In one of the many ancient "baoris" or step wells in the Ranthambhore tiger reserve in India, I witnessed an amazing natural history moment on the 25th April 2016. An Indian Rat Snake (Ptyas mucosa) had caught a Bull frog. As the snake tried to swallow the frog down, the frog inflated its body and kept trying to force himself out of the snake's death grip. The struggle between the predator and the prey went on for about 10 minutes and I could see that the frog was bleeding in a few places. After about 10 minutes when it seemed as if all was nearly over for the frog, the frog, surprisingly managed to break free of the snakes jaws to disappear in the mucky water. The frog's escape was so fast that we could not even get one shot of that.
The Rat snake is a very aggressive hunter but the Bull frog is no push over.