The Pegu rice frog (Microhyla berdmorei) is a narrow-mouthed frog initially described from Pegu, Myanmar.It occurs from northeast India through Myanmar, Yunnan Province in China, Thailand, Laos, Cambodia, Viet Nam, peninsular Malaysia, Sumatra, Borneo and perhaps also in Bangladesh, although molecular evidence suggests that individuals from Bangledesh may be a distinct (novel) species (Hasan et al. 2012).It is known by multiple common names including Berdmore’s narrow-mouthed frog and Berdmore’s chorus frog.There is evidence that this may be a complex of more than one cryptic species (currently including Microhyla fowleri, which may return to species status when further analysis to distinguish species limits is completed).
A small frog, M. berdmorei males reach 25 mm snout-vent length, and females 45 mm.This frog has a broad head, pointed snout and smooth brown dorsal skin with dark marks across the shoulders and between the eyes.The underbelly is a characteristic yellow.Their slender toes are mostly webbed and are tipped with small toe discs.Long legs allow them to jump long distances.In the lab, this species shows several types of defensive behaviors, including feigning death, crouching down, staying motionless, and stiffening of legs.
The Pegu rice frog is reported as a common species on forest floors of moist, lowland, primary and secondary evergreen forests, especially in hilly areas.It breeds in still or stagnant ponds, and adults prefer to be near water.Males congregate in large choruses to breed.The delicate tadpoles suspension feed in mid water, growing to about 23 mm before metamorphosis.Tadpole mouth features are described in detail by Gut content analysis of tadpoles and adults show that tadpoles feed on multiple types of phytoplankton and zooplankton. Adult frogs eat small insects, especially ants and termites.