Juergen Freund / Common Frog egg (frogspawn) with developoing embryo (Rana temporaria) Germany

Juergen Freund / Common frog juvenile (Rana temporaria)

Juergen Freund / Toads in pond during mating season (Bufo bufo) Germany Split-level

Juergen Freund / Orange-thighed Frog (Litoria xanthomera) portrait, Queensland, Australia.

Juergen Freund / Frog camouflaged within the walls of a cave in Caramoan Peninsula, Camarines Sur, Luzon, Philippines 2008.

Juergen Freund / White-lipped tree frog {Litoria infrafrenata} on Heliconia palm frond, Queensland, Australia

Juergen Freund / Striped poison arrow frog {Phyllobates boulengeri} emerging through hole in leaf, Gorgona Island, Colombia

Juergen Freund / Cane toad / Giant toad (Bufo marinus) with poison from glands, an introduced species in Queensland, Australia

Juergen Freund / Cane toad / Giant toad (Bufo marinus), an introduced species in Queensland, Australia. Close-up of poison glands

Juergen Freund / Cane toad / Giant toad (Bufo marinus), an introduced species in Queensland, Australia

Juergen Freund / Cane toad / Giant toad (Bufo marinus), an introduced species in Queensland, Australia

Juergen Freund / White-lipped Tree Frog (Litoria infrafrenata) on hand, Queensland, Australia