Family: Dicroglossidae - Fork-tongued Frogs
Order: Anura - Frogs
Class: Amphibia
Phylum: Chordata - Vertebrates
Kingdom: Animalia
Red List status: Least Concern

Male Female
Adult length: 32-50 mm 49-58 mm
Tadpole length: 45 mm
Indonesia, Indochina and the Malay Peninsula. Genetically distinct but morphologically identical species occur outside this range from India to Japan.
Other common names: Indian rice frog, Indian cricket frog, common pond frog, field frog, marsh frog
Adult:
Relatively small, slender oval frog with robust limbs, a narrow head,
pointed snout and visible
tympanum with black
colouration in the upper half. Fingers and toes are pointed, with blunt
finger tips; and toes are less than half-webbed. A series of broken
ridges run down
the length of the dorsum, though patterning and colour are both highly
variable. Ground colour is grey to brown; dark patterning is typically
characterised by a 'U' or 'W' shape across the shoulders, with similar
markings generally banding the
dorsum. A pale stripe
may be present down the midline of the back from the snout to the anus.
Atypically, there may be small patches or markings of bright green
dorsally.

The
ventral surface is white, with a black 'W' marking at the throat in
males. The lower lip is barred with two or three brown bands. There are
two rows of
vomerine teeth behind the
choanae. There are
two vocal sacs
beneath the throat.
Call: A rapidly repeated, "raspy chirp" (Inger & Steubing, 2005)
.
Tadpole: Oval tadpole with a tail twice the length of the body. The body is olive green speckled black dorsally and on the sides, and white below. The end of the tail is barred black or wholly black..
Throat details of a male Asian grass frog.
Striped form from the same Cambodian population
Dorsal view of Asian grass frog
Similar species: This widespread and highly variable frog can only be distinguished with certainty from similar, often undescribed species through genetic analysis or features of its distribution. It is thought, however, that several species within this complex may be sympatric in Java, and possibly in much of Southeast Asia (Toda et al, 1998). Such species can only be distinguished genetically. In addition, F. limnocharis is morphologically similar to the mangrove frog (F. cancrivora), but can be distinguished by the presence of a small outer metatarsal tubercle on the hind foot in F. limnocharis.
A cosmopolitan species that can be found in most wet, open habitats around waterways or standing water, often around ditches, puddles or temporary pools. These frogs appear to exhibit a preference for anthropogenic habitats.
Elevation: 0 - 2 000 m
Reproductive behaviour: Males typically aggregate around standing water in large groups following heavy rain, typically breeding in paddy fields or temporary pools.
Diet: The adult diet includes insects, millipedes and occasionally snails.
Global Amphibian Assessment
Berry, P. Y. (1975) The Amphibian Fauna of Peninsular Malaysia,
Tropical Press, Kuala Lumpur, .Malaysia.
Inger, R. F. and Stuebing, R. B. (2005) A Field
Guide to the Frogs of Borneo. Second Edition. Natural History
Publications (Borneo), Kota Kinabalu: 201pp
Thy, N. and Holden, J. (2008) A Field Guide to the Amphibians of Cambodia Fauna & Flora International, Phnom Penh: 127pp
Toda, M., Matsui, M., Nishida, M. and Ota, H. (1998) Genetic divergence among Southeast and East Asian populations of Rana limnocharis (Amphibia: Anura), with special reference to sympatric cryptic species in Java. Zoological Science 15: 607-613
Van Dijk, P.P., Iskandar,
D., Inger, R., Lau, M.W.N., Zhao, E., Baorong, G., Dutta, S.,
Manamendra-Arachchi, K., de Silva, A., Bordoloi, S., Kaneko, Y., Matsui,
M. and Khan, M.S. (2004). Fejervarya limnocharis. In: IUCN 2008.
2008 IUCN Red List of
Threatened Species.
Dr. Bryan Stuart, Chicago Field Museum,
personal communication

Fejervarya limnocharis male calling. Kep National Park, Cambodia. Note the dual vocal sacs beneath the throat.