Bicolored Frog, Clinotarsus curtipes
The Bicolored Frog (Clinotarsus curtipes) is a species of frog located in the Western Ghats on India. This frog has a very toad-like nature. The tadpoles of this species are black and create dense and compact schools in slow moving streams in forested areas.
Its vomerine teeth are scarcely developed, sometimes indistinct. The teeth are in two slightly slanting series on a level with the hind edge of the choanae. Its head is large, the snout short and rounded with well marked canthus rostralis and concave loreal region, the nostril closer to the end of the snout than to the eye, the interorbital space is broader than the upper eyelid, and the tympanum is distinct and nearly as large as the eye. The fingers are moderate, first extending beyond the second, the toes are short and nearly entirely webbed, the tips of the fingers and toes are swollen or dilated into very small discs; the subarticular tubercles are much developed; the inner metatarsal tubercle is small, oval and blunt, and there is a rather large and flat tubercle at the base of the fourth toe. There is no tarsal fold. The tibio-tarsal articulation reaches the eye. The skin is finely granular above with a moderately prominent and rather narrow glandular lateral fold. There is another fold behind the tympanum down to the shoulder. This frog is a grayish or brown color above with or without blackish dots, with the lateral fold lighter. It is edged with black with a blackish oblique spot or band below the eye. The upper lip hasÂ blackish margin. The limbs are a dark purplish brown without cross bands. It is light brown beneath and the throat is sometimes dark brown. The male has an internal subgular vocal sac.
The spot patterns on the backs are often distinctive enough to be utilized for population estimation using capture and recapture techniques.
The adults may sometimes feign death to escape predators.
The tadpoles are large and create shoals in slow moving streams.
Image Caption: Bicolored Frog, Rana curtipes. Credit: L. Shyamal/Wikipedia (CC BY-SA 2.5)