Robert Valentic / Narrow-mouthed frog (Microhyla marmorata) male, from montane rainforest at Phong Lan, Bach Ma National Park, Vietnam. Dry season.

Chien Lee / Asian Horned Frog (Megophrys nasuta) female and Matang Narrow-mouthed Frog (Microhyla nepenthicola) camouflaged in leaf litter, Kubah National Park, Sarawak, Malaysia

Chien Lee / Asian Horned Frog (Megophrys nasuta) female and Matang Narrow-mouthed Frog (Microhyla nepenthicola) camouflaged in leaf litter, Kubah National Park, Sarawak, Malaysia

Chien Lee / Borneo Narrow-mouthed Frog (Microhyla borneensis) male, Bengoh Range, Sarawak, Borneo, Malaysia

Yashpal Rathore / Ornate narrow-mouthed frog (Microhyla ornate) Amboli, Maharashtra, India.

Chien Lee / Matang Narrow-mouthed Frog (Microhyla nepenthicola) froglet climbing out of pitcher plant in which it was born, Malaysia

Shibai Xiao / Beautiful Pygmy Frog (Microhyla pulchra) inflating vocal sac during breeding season, Bawangling National Nature Reserve, Hainan Island, China.

Shibai Xiao / Beautiful pygmy frog (Microhyla pulchra) on black background, Bawangling National Nature Reserve, Hainan Island, China.

Chien Lee / Matang Narrow-mouthed Frog (Microhyla nepenthicola) tadpoles in a pitcher of Flask-shaped Pitcher Plant (Nepenthes ampullaria), Kubah National Park, Sarawak, Borneo, Malaysia

Chien Lee / Matang Narrow-mouthed Frog (Microhyla nepenthicola) tadpoles in a pitcher of Flask-shaped Pitcher Plant (Nepenthes ampullaria), Kubah National Park, Sarawak, Borneo, Malaysia

Chien Lee / Borneo Narrow-mouthed Frog (Microhyla borneensis), Kubah National Park, Malaysia

Thomas Marent / Manthey's Narrow-mouthed Frog (Microhyla mantheyi), Forest Research Institute Malaysia, Malaysia