Morley Read / Developing embryo of the Ecuadorian monkey frog (Phyllomedusa ecuatoriana), showing heart beating and blood flowing, Morona Santiago Province, Ecuador, (non-ex)

Chris Mattison / Barred leaf frog (Phyllomedusa tomopterna) captive from South America.

Chris Mattison / Waxy leaf frog (Phyllomedusa sauvagii), captive, occurs South and Central America

Michael D. Kern / Waxy monkey tree frog (Phyllomedusa sauvagii) captive, from Central and South America

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

Pete Oxford / Giant leaf frog (Phyllomedusa bicolor) climbing along branch in rainforest, Iwokrama Reserve, Guyana

Pete Oxford / Giant leaf frog (Phyllomedusa bicolor) climbing along branch in rainforest, Iwokrama Reserve, Guyana

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

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

Alex Hyde / Giant waxy monkey frog (Phyllomedusa bicolor). Lowland Amazon rainforest, Manu Biosphere Reserve, Peru.