Chien Lee / White-lined Leaf Frog (Phyllomedusa vaillanti) in rainforest, Ecuador

Piotr Naskrecki / Giant Monkey Frog (Phyllomedusa bicolor) female watching an approaching male, Surinam

Tim Fitzharris / Tiger-striped Leaf Frog (Phyllomedusa tomopterna) on Heliconia, Costa Rica

Piotr Naskrecki / Splendid Leaf Frog (Agalychnis calcarifer) a rarely seen species associated with natural forest gaps, Costa Rica

Michael & Patricia Fogden / Blue-sided Leaf Frog (Agalychnis annae) hanging on leaf, close-up, cloud forest, Costa Rica

Michael & Patricia Fogden / Tiger-striped Leaf Frog (Phyllomedusa tomopterna) on Heliconia (Heliconia stricta), Amazon rainforest, Peru

Claus Meyer / Tiger-striped Leaf Frog (Phyllomedusa tomopterna) or Barred Leaf Frog, portrait, Amazon ecosystem, Brazil

Konrad Wothe / Lemur Frog (Phyllomedusa lemur), Monteverde Cloud Forest Reserve, Costa Rica

Claus Meyer / Tiger-striped Leaf Frog (Phyllomedusa tomopterna) waving, Amazon rainforest, Brazil

Agustin Esmoris / Tree Frog (Phyllomedusa tetraploidea), Argentina

Thomas Marent / Gliding Leaf Frog (Agalychnis spurrelli), Cauca, Colombia

Thomas Marent / Gliding Leaf Frog (Agalychnis spurrelli), Cauca, Colombia

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer), native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer) climbing, native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer) climbing, native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer), native to South America

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), native to South America

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer), native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer), native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer) climbing, native to South America

Pete Oxford / Agua Rica Leaf Frog (Phyllomedusa ecuatoriana) on palm leaf, native to South America

Pete Oxford / Agua Rica Leaf Frog (Phyllomedusa ecuatoriana) peeking over leaf, native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer), native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer), native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer), native to South America

Pete Oxford / Splendid Leaf Frog (Agalychnis calcarifer), native to South America

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), native to South America

Piotr Naskrecki / Tiger-striped Leaf Frog (Phyllomedusa tomopterna) walking, Suriname

Ingo Arndt / Gliding Leaf Frog (Agalychnis spurrelli) eye closed with semi-transparent eyelid that allows it to see its surroundings even while resting, Costa Rica

Ingo Arndt / Splendid Leaf Frog (Agalychnis calcarifer) walking on branch, Costa Rica

Hiroya Minakuchi / Gliding Leaf Frog (Agalychnis spurrelli) stretching leg, Costa Rica

Hiroya Minakuchi / Splendid Leaf Frog (Agalychnis calcarifer) in defensive posture, Costa Rica

Hiroya Minakuchi / Splendid Leaf Frog (Agalychnis calcarifer), Costa Rica

Hiroya Minakuchi / Gliding Leaf Frog (Agalychnis spurrelli), Costa Rica

Christian Ziegler / Blue-sided Leaf Frog (Agalychnis annae), San Jose, Costa Rica

Thomas Marent / Blue-sided Leaf Frog (Agalychnis annae), Costa Rica

Piotr Naskrecki / Tiger-striped Leaf Frog (Phyllomedusa tomopterna) climbing stem, Brownsberg Reserve, Surinam

Piotr Naskrecki / White-lined Leaf Frog (Phyllomedusa vaillanti), Brownsberg Reserve, Surinam

Piotr Naskrecki / White-lined Leaf Frog (Phyllomedusa vaillanti), Brownsberg Reserve, Surinam

Piotr Naskrecki / Giant Monkey Frog (Phyllomedusa bicolor) in rainforest, Brownsberg Reserve, Surinam

Piotr Naskrecki / Giant Monkey Frog (Phyllomedusa bicolor) in rainforest, Sipaliwini, Surinam

Piotr Naskrecki / Giant Monkey Frog (Phyllomedusa bicolor) in rainforest, Sipaliwini, Surinam

Piotr Naskrecki / Giant Monkey Frog (Phyllomedusa bicolor) pair mating, Sipaliwini, Surinam

Piotr Naskrecki / Giant Monkey Frog (Phyllomedusa bicolor) pair mating, Sipaliwini, Surinam

Michael & Patricia Fogden / Splendid Leaf Frog (Agalychnis calcarifer), La Selva Biological Research Station, Costa Rica

Michael & Patricia Fogden / Splendid Leaf Frog (Agalychnis calcarifer), La Selva Biological Research Station, Costa Rica

Piotr Naskrecki / Tiger-striped Leaf Frog (Phyllomedusa tomopterna), Surinam

Piotr Naskrecki / White-lined Leaf Frog (Phyllomedusa vaillanti) climbing stem, Surinam

Piotr Naskrecki / Giant Monkey Frog (Phyllomedusa bicolor) female watching an approaching male, Surinam

Luciano Candisani / Orange-legged Leaf Frog (Phyllomedusa hypochondrialis), Pantanal, Brazil

Luciano Candisani / Orange-legged Leaf Frog (Phyllomedusa hypochondrialis), Pantanal, Brazil

Luciano Candisani / Orange-legged Leaf Frog (Phyllomedusa hypochondrialis), Pantanal, Brazil

Thomas Marent / Giant Monkey Frog (Phyllomedusa bicolor) walking along branch, Tambopata Candamo Reserve, Peru

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli) in tucked position, northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli) on white background, northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli) in bromeliad, northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), northwest Ecuador

Pete Oxford / Gliding Leaf Frog (Agalychnis spurrelli), northwest Ecuador

Pete Oxford / Giant Monkey Frog (Phyllomedusa bicolor), Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Giant Monkey Frog (Phyllomedusa bicolor), Iwokrama Rainforest Reserve, Guyana

Pete Oxford / Giant Monkey Frog (Phyllomedusa bicolor) climbing up branch, Iwokrama Rainforest Reserve, Guyana

Murray Cooper / Tiger-striped Leaf Frog (Phyllomedusa tomopterna), Amazon, Ecuador

Murray Cooper / Tree Frog (Phyllomedusa hulli) on moss, Amazon, Ecuador

Piotr Naskrecki / Tiger-striped Leaf Frog (Phyllomedusa tomopterna) climing twig, Brownsberg Reserve, Surinam

Piotr Naskrecki / Giant Monkey Frog (Phyllomedusa bicolor), Brownsberg Reserve, Surinam

Piotr Naskrecki / Giant Monkey Frog (Phyllomedusa bicolor) portrait, Brownsberg Reserve, Surinam

Kevin Schafer / White-lined Leaf Frog (Phyllomedusa vaillanti) on heliconia, Tambopata National Reserve, Peru

Thomas Marent / Lemur Frog (Phyllomedusa lemur) portrait, Siquirres, Costa Rica

Thomas Marent / Splendid Leaf Frog (Agalychnis calcarifer) portrait, Siquirres, Costa Rica

Thomas Marent / Lemur Frog (Phyllomedusa lemur) portrait, Siquirres, Costa Rica

Tim Fitzharris / Gliding Leaf Frog (Agalychnis spurrelli) on Heliconia (Heliconia sp), Costa Rica

Tim Fitzharris / Gliding Leaf Frog (Agalychnis spurrelli) portrait, Costa Rica

Theo Allofs / Tree Frog (Phyllomedusa sp) on stem of heliconia flower, Tambopata River, Peru

Thomas Marent / Giant Monkey Frog (Phyllomedusa bicolor) head, Tambopata-Candamo Nature Reserve, Peru

Christian Ziegler / Blue-sided Leaf Frog (Agalychnis annae) portrait, San Jose, Costa Rica

Christian Ziegler / Blue-sided Leaf Frog (Agalychnis annae) portrait, San Jose, Costa Rica

Christian Ziegler / Blue-sided Leaf Frog (Agalychnis annae) egg clutch, San Jose, Costa Rica

Piotr Naskrecki / White-lined Monkey Frog (Phyllomedusa vallianti) walking along twig, Guyana

Piotr Naskrecki / Orange-legged Leaf Frog (Phyllomedusa hypochondrialis), Guyana

Piotr Naskrecki / Orange-legged Leaf Frog (Phyllomedusa hypochondrialis) portrait, Guyana

Michael Durham / Tiger-striped Leaf Frog (Phyllomedusa tomopterna) or Barred Leaf Frog, jumping from a colorful Heliconia flower, native to South America, Surinam, Guyana, Brazil

Michael Durham / Tiger-striped Leaf Frog (Phyllomedusa tomopterna), native to Surinam, Guyana and Brazil

Piotr Naskrecki / Splendid Leaf Frog (Agalychnis calcarifer) rarely seen species associated with natural forest gaps, Costa Rica

Pete Oxford / White-lined Leaf Frog (Phyllomedusa vaillanti) tadpole, first day out of water, Amazon, Ecuador

Pete Oxford / White-lined Leaf Frog (Phyllomedusa vaillanti) two weeks after metamorphosing from tadpole, Amazon, Ecuador

Pete Oxford / White-lined Leaf Frog (Phyllomedusa vaillanti) two weeks after metamorphosing from tadpole, Amazon, Ecuador

Pete Oxford / White-lined Leaf Frog (Phyllomedusa vaillanti) tadpole tail almost completely absorbed into the body, Amazon, Ecuador

Pete Oxford / White-lined Leaf Frog (Phyllomedusa vaillanti) tadpole, fifth day out of water, Amazon, Ecuador