Maxime Aliaga / Amazonian horned frog (Ceratophrys cornuta) camouflaged amongst leaf litter on lowland rainforest floor. Madre de Dios, Peru.

Chris Mattison / Argentine horned frog (Ceratophrys ornata) skin and eye close up.

Chris Mattison / Argentine horned frog (Ceratophrys ornata) skin close up.

Chris Mattison / Amazon horned frog (Ceratophrys cornuta) close up, Brazil, South America

Chris Mattison / South Amercian horned frog (Ceratophrys cornuta) sitting on dried leaves, Brazil, South America