Frogs of the World

Blyth’s River Frog (Limnonectes blythii)

photo by Psumuseum

Common Name: Blyth’s River Frog, Giant Asian River Frog, or Blyth’s Wart Frog
Scientific Name: Limnonectes blythii
Family: Dicroglossidae
Location: Indonesia, Laos, Malaysia, Myanmar, Singapore, Thailand, and Vietnam
Size: females can reach 10.2 inches (25.9 cm), while males only reach 4.9 inches (12.4 cm) long

The Blyth’s River Frog is the largest frog in all of Asia. Their large size has its downsides, as people over harvested them for food as they can weigh more than 2 pounds (.9 kg). It is one of the reason why they are listed as Near Threatened by the International Union for the Conservation of Nature (IUCN) Red List.┬áThe frogs also aren’t doing too hot due to logging activities in the region.

photo by Thai National Parks

The courtship behavior of Blyth’s River Frog is different than most frog species. Instead of males calling for the females, the females call. The male frogs completely lack a vocal sac. The male also creates a hollow in the stream for the females to lay their eggs. The males will then guard the eggs against predators that might try to eat them. The frogs are capable of breeding all year long.