Hylarana erythraea (Green Paddy Frog) is one of the most beautiful south-Asian frogs. This species is sexually dimorphic, with adult females reaching a maximum size of 78 mm in snout-vent length, and males reaching a maximum of 48 mm in snout-vent length (Brown & Alcala, 1970). It feeds on small terrestrial invertebrates such as small millipedes, crickets and ants (Inger & Stuebing, 2005). The Green Paddy Frog has bright to dark green colour with broad dorsolateral fold covered with yellow stripe and broad dark stripe on sides of head and body. It also has pointed and projecting snout. Its fingers are slender and the first finger is little shorter than the second while the toes are nearly entirely webbed.

This species inhabits primary forest, degraded, secondary forest, scrub, grassland, cultivated area or plantation, freshwater wetland and coastal. It is occurs in Brunei, Kalimantan, Sabah and Sarawak and widely distributed in Southeast Asia (Inger & Stuebing, 2005). In Ulu Muda Forest Reserve, the Green Paddy Frog can be found perching on small tree branch near field station at the altitude about 0 - 1100m above sea level.