Duncan Murrell / Common Southeast Asia tree frog (Polypedates leucomystax), Puerto Princesa Subterranean River National Park, Palawan, the Philippines.

Nick Garbutt / Smokey Jungle Frog (Leptodactylus pentadactylus), forests near Napo River, Amazonia, Ecuador, South America.

MYN / Andrew Snyder / Knudsen's thin-toed frog (Leptodactylus knudseni), Berbice River, Guyana, September. Meetyourneighbours.net project.

MYN / Andrew Snyder / Peters' ground frog (Leptodactylus petersi), Berbice River, Guyana, September. Meetyourneighbours.net project.

Chris Mattison / Ahl's river frog (Phrynobatrachus latifrons), captive, occurs West Africa.

Chris Mattison / Ahl's river frog 1+Phrynobatrachus latifrons+2, captive, occurs in West Africa

Piotr Naskrecki / Painted Reed Frog (Hyperolius marmoratus) portrait, Okavango Delta, Botswana

Piotr Naskrecki / Painted Reed Frog (Hyperolius marmoratus) changing color from darkly patterned to white by contracting or expanding skin cells called chromatophores, white skin reflects sunlight effectively lowering...

Piotr Naskrecki / Painted Reed Frog (Hyperolius marmoratus) clinging to reed, Okavango Delta, Botswana

Chien Lee / Painted Reed Frog (Hyperolius marmoratus) at night, Okavango Delta, Botswana

Tim Laman / White-lipped tree frog (Litoria infrafrenata) in gallery forest along the Archer River. Piccaninny Plains Sanctuary, Cape York Peninsula, Queensland, Australia