Luciano Candisani / Crilloa Frog (Leptodactylus ocellatus), Sao Paulo, Brazil

Chien Lee / Harlequin Flying Tree Frog (Rhacophorus pardalis) males competing for female making a foam nest, Kubah National Park, Sarawak, Borneo, Malaysia

Pete Oxford / Mexican White-lipped Frog (Leptodactylus fragilis), Hato Masaguaral working farm and biological station, Venezuela

Pete Oxford / Knudsen's Frog (Leptodactylus knudseni), Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Knudsen's Frog (Leptodactylus knudseni), Iwokrama Rainforest Reserve, Guyana

Tim Laman / Wallace's flying frog (Rhacophorus nigropalmatus) foam nest with eggs above a pig wallow pool in the lowland rainforest of Danum Valley Conservation Area, Sabah, Borneo, Malaysia.

Murray Cooper / Smokey Jungle Frog (Leptodactylus pentadactylus) camouflaged in leaf litter, Amazon, Ecuador

James Christensen / Smokey Jungle Frog (Leptodactylus pentadactylus) with injured jaw, Colon, Panama

Piotr Naskrecki / African Foam-nest Treefrog (Chiromantis rufescens), Atewa Range, Ghana

Piotr Naskrecki / African Foam-nest Treefrog (Chiromantis rufescens) pair in amplexus, Atewa Range, Ghana

James Christensen / Tungara Frog (Physalaemus pustulosus) pair in amplexus at night, building foam nest for eggs, Panama

Michael & Patricia Fogden / Grey Tree Frog (Chiromantis xerampelina) group foam nesting over seasonal pond, South Africa