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

Michael D. Kern / Two Dyeing dart frogs (Dendrobates tinctorius) against background, captive occurs in Guyana, Suriname, Brazil, and French Guiana. Available for on-line use only.

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

Rod Williams / Yellow-banded Poison Dart Frog (Dendrobates leucomelas) sitting on colourful variegated leaves. Captive, found in Brazil, Guyana, Venezuela

Michael D. Kern / Powder blue dart frog (Dendrobates tinctoruis) pair, captive, from Central America

Rod Williams / Golden Poison Dart Frog (Phyllobates terribilis) captive, from Colombia, Endangered Species

Edwin Giesbers / Strawberry poison dart / arrow frog (Dendrobates pumilio) on leaf, Costa Rica

Michael D. Kern / Dyeing Poison Dart Frog {Dendrobates tinctorius} captive, from Surinam, South America

Michael D. Kern / Cobalt blue poison dart frog {Dendrobates azureus} captive, Surinam, South America

Mark Payne-Gill / Poison Arrow / Blue Poison Dart frog {Dendrobates azureus} South America

Mark Moffett / Golden Poison Dart Frog (Phyllobates terribilis) the most poisonous of the dart frogs, male carrying tadpoles on his back, Colombia

Mark Moffett / Golden Poison Dart Frog (Phyllobates terribilis) the most poisonous of the dart frogs, western Colombia