Nostrils are prominent in Rana grylio . They have an elevated fold of skin over the ear that runs to the shoulder, and the ear is orange-brown in color with a green center. Pig frogs are sexually dimorphic in size and coloration. Males and females have similar growth rates until the snout-vent length reaches about 100mm. The male's ear is greatly larger than its eye, whereas the female's ear is equal in size to the eye.
Mature tadpoles are very colorful.
They have a yellow belly with prominent reticulation on brownish black. Their sides have yellow spots that are encircled by a pinkish color. From the throat region to the pectoral region is clear black and across the pectoral region is green. The Pig frog is mainly active at night and does most of its feeding at this time. Reproduction Little appears to be known about the reproduction of Pig frogs.