Chien Lee / Ecuador Poison Frog (Epipedobates bilinguis), El Coca, Ecuador

Lucas Bustamante / Anthony's poison-frog (Epipedobates anthonyi) seen through hole in leaf. Buenaventura Reserve, El Oro, Ecuador.

Bert Willaert / Marbled poison dart frog (Epipedobates boulengeri) on leaf, Ecuador.

Bert Willaert / Brightly Coloured Poison-Dart Frog (Oophaga sylvatica). Ecuador, South America.

MORLEY READ / Poison arrow frog {Dendrobates / Epipedobates bilinguis} Yasuni NP, Ecuador

Pete Oxford / Poison arrow frog guarding its eggs {Epipedobates tricolor} Ecuador

Mark Moffett / Red-headed Poison Frog (Dendrobates fantasticus) portrait, Amazonia, Ecuador

Mark Moffett / Red-headed Poison Frog (Dendrobates fantasticus), Amazonia, Ecuador

Mark Moffett / Phantasmal Poison Dart Frog (Epipedobates tricolor) near Cuenca, Ecuador this frog exudes epibatidine, a chemical with analgesic qualities two hundred times as powerful as morphine

Doug Wechsler / Phantasmal poison arrow frog {Epipedobates tricolor} in cloud forest, El Oro, Ecuador

Pete Oxford / Poison arrow frog {Dendrobates histrionicus} Western Ecuador

Pete Oxford / Poison Arrow Frog (Epipedobates tricolor) Ecuador Amazon South-America. colourful.