About Leptobrachium hasseltii Tschudi, 1838
Leptobrachium hasseltii has a large head that is wider than its body. It has large eyes with a scarlet iris, rounded digit tips that are webbed at the base, and smooth skin. Adult individuals are dark on their upper side, marked with darker circular patterns, and have a white ventral surface covered in black blotches. Juveniles of this species are bluish in color. Females are larger than males, reaching 70 mm (2.8 in) in snout-vent length, while males reach 60 mm (2.4 in) in snout-vent length. This species lives in the forest floor litter of both montane and lowland rainforests. Its tadpoles inhabit quiet pools and ponds. Leptobrachium hasseltii is currently threatened by deforestation.