English name: Asian Grass Frog (aka “Cricket Frog”, “Ricefield Frog”, “Paddy Frog”)
Scientific name: Fejervarya limnocharis, (formerly known as Rana limnocharis)
Thai name: Kob nong, Kiat e-mo, Kiat bak-m
Description: Up to 6cm long. A medium-sized frog with a long narrow snout. Broken-up skin ridges make lines across the top of the body. Body is brown or gray with a yellow, tan, or green stripe down the middle that may be wide, narrow, or sometimes absent. Often has dark brown or black markings as well. Lips have alternating dark/light bands. Underside is white.
Tadpoles can be up to 4cm long. They are oval-shaped with a tail twice as long as the body. Body is brown or gray on top and silver on the bottom.
Call: A loud grating chirp that is reminiscent of a cricket.
Similar Species: Brackish Frog has deeper and more pointed snout, and is usually found near coastal waters
Green Paddy Frog has smooth skin and light stripes on the sides.
Three-striped Grass Frog has smooth skin, is more slender, and has three stripes.
Chinese Edible Frog is larger, much heavier, and never has a dorsal stripe.
Round-tongued Floating Frog is “rounder” with shorter legs and lacks the skin ridges.
Habitat: Can be found in almost any wet habitat, including rivers, lakes, ponds, canals, marshes, rice fields, ditches, and puddles in empty lots. Is more common in open areas and human-disturbed habitats than in undisturbed forest.
Place in the ecosystem: Eats insects, millipedes, and worms. Eaten by birds, snakes, lizards, larger frogs, and fish.
Danger to humans: No danger to humans.
Conservation status and threats: They have a wide distribution, can live in almost any habitat, and are very common, so there are no current threats to their conservation status.
Interesting facts: As with many widespread Asian herps, the Asian Grass Frog is actually several different species that look similar to each other, but are genetically different and do not interbreed. It will take much more study (and especially genetic testing) to continue deliniating which species is which and how far each one ranges, but in the last 25 years many new species of Grass Frog have already been named across Asia, all formerly assumed to be under the single “Asian Grass Frog” species.
Ecology Asia: Field Frog
Frogs of Borneo: Fejervarya limnocharis
AmphibiaWeb: Fejervarya limnocharis
Wikipedia: Fejervarya limnocharis
The IUCN Red List: Fejervarya limnocharis
A Field Guide to the Amphibians of Cambodia
Simon and Schuster’s Guide to Reptiles and Amphibians of the World