Costa Rica brook frog
The skin of the frog's back is green in color.  The belly and neck are bright yellow.  The parts of the legs that face the ground are yellow but less bright.  There is a yellow-white stripe from the mouth to the place where the legs meet the body, one on each side.  The iris of the eye is bright red.  The female frog is bigger than the male frog, and she has bigger eardrums.