Heidi & Hans-Juergen Koch / Cayenne Slender-legged Tree Frog (Osteocephalus leprieurii) completely developed young frog sitting in shallow water, native to South America

Phil Savoie / Tree frog (Ostocephalus oophagus) in bromeliad, female lays eggs for her tadpoles to eat. Brazil, South Americal

Piotr Naskrecki / Manaus Slender-legged Treefrog (Osteocephalus taurinus) in rainforest, Suriname

Pete Oxford / Ecuador Slender-legged Treefrog (Osteocephalus verruciger), Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / Yasuni Treefrog (Osteocephalus yasuni), Yasuni National Park, Amazon, Ecuador

Pete Oxford / Tree Frog (Osteocephalus sp), Yasuni National Park, Amazon, Ecuador

Bert Willaert / Manaus Slender-legged Treefrog (Osteocephalus taurinus) portrait. Ecuador, January.

Pete Oxford / Giant broad-headed tree frog (Osteocephalus taurinus) in rainforest, Iwokrama Reserve, Guyana

Pete Oxford / Giant broad-headed tree frog (Osteocephalus taurinus) in rainforest, Iwokrama Reserve, Guyana

Juan Manuel Borrero / Tree frog (Osteocephalus taurinus) profile portrait sitting on leaf, Pacaya Samiria National Reserve. Amazon Basin. Loreto. Peru

Pete Oxford / Manaus Slender-legged Treefrog (Osteocephalus taurinus), Iwokrama Rainforest Reserve, Guyana

Murray Cooper / Buckley's Slender-legged Treefrog (Osteocephalus buckleyi), Amazon, Ecuador

Thomas Marent / Buckley's Slender-legged Treefrog (Osteocephalus buckleyi) portrait, Tambopata National Reserve, Peru

Piotr Naskrecki / Forest Bromeliad Treefrog (Osteocephalus cabrerai) portrait on leaf, Guyana

Pete Oxford / Tree frog {Osteocephalus taurinus} Yasuni NP, Ecuador

Pete Oxford / Tree frog {Osteocephalus sp} Amazonia, Ecuador

MORLEY READ / Buckleys bonehead tree frog {Osteocephalus buckleyi} Yasuni NP, Ecuador

MORLEY READ / Yasuni bonehead tree frog {Osteocephalus yasuni} Yasuni NP, Ecuador

MORLEY READ / Quacking bonehead tree frog {Osteocephalus sp} Yasuni NP, Ecuador

Pete Oxford / Tree frog climbing tree {Osteocephalus sp} Amazonia, Ecuador

Pete Oxford / Tree frog {Osteocephalus taurinus} Iwokrama reserve, Guyana

Pete Oxford / Tree frogs in amplexus {Osteocephalus taurinus} Iwokrama reserve, Guyana

Pete Oxford / Large treefrog {Osteocephalus taurinus}, hanging from branch, Yasuni NP, Ecuador

Phil Savoie / Treefrog female laying eggs in Bromeliad plant pool for her tadpoles to eat, Brazil

Heidi & Hans-Juergen Koch / Cayenne Slender-legged Tree Frog (Osteocephalus leprieurii) silhouette of tadpole with developed tail and legs, native to South America

Heidi & Hans-Juergen Koch / Cayenne Slender-legged Tree Frog (Osteocephalus leprieurii) tadpole with developed tail and legs, native to South America

Heidi & Hans-Juergen Koch / Cayenne Slender-legged Tree Frog (Osteocephalus leprieurii) close-up of three tadpoles, native to South America

Heidi & Hans-Juergen Koch / Cayenne Slender-legged Tree Frog (Osteocephalus leprieurii) close-up portrait of tadpole, native to South America

Heidi & Hans-Juergen Koch / Cayenne Slender-legged Tree Frog (Osteocephalus leprieurii) tadpoles, native to South America

Piotr Naskrecki / Manaus Slender-legged Treefrog (Osteocephalus taurinus) in rainforest looking over its shoulder, Suriname

Pete Oxford / Ecuador Slender-legged Treefrog (Osteocephalus verruciger), Yasuni National Park, Amazon Rainforest, Ecuador

Pete Oxford / Tree Frog (Osteocephalus sp), Yasuni National Park, Amazon, Ecuador

Pete Oxford / Tree Frog (Osteocephalus sp), Yasuni National Park, Amazon, Ecuador