Phil Savoie / Red eyed tree frog on heliconia (Agalychnis callidryas)

David Perpinan / Male Mediterranean tree frog (Hyla meridionalis) calling, showing vocal sac inflating, Barcelona, Spain, May. Filmed at night with an infrared camera.

Pete Oxford / San Lucas marsupial frog (Gastrotheca pseustes) captive, occurs in Ecuadorian Andes.

Pete Oxford / Marsupial Frog (Gastrotheca riobambae) tadpole, native to South America

Pete Oxford / Marsupial Frog (Gastrotheca orophylax), native to South America

Pete Oxford / Marsupial Frog (Gastrotheca orophylax) hiding in bromeliad, native to South America

Pascal Pittorino / Mediterranean tree frogs (Hyla meridionalis) mating on a branch of Quince tree (Cydonia oblonga) Var, Provence, France, April.

Pascal Pittorino / Mediterranean tree frog (Hyla meridionalis) resting on a Red rose (Rosa sp) in organic garden, Toulon, Var, Provence, France, May.

Philippe Clement / Common tree frog (Hyla arborea) sitting on branch covered in lichen at night with full moon, La Brenne, France, May. Digital composite

Pete Oxford / San Lucas marsupial frog (Gastrotheca pseustes) base of Chimborazo Volcano (Highest mountain in Ecuador), Andes, Ecuador, South America - endemic to Ecuador, endangered species.

Konrad Wothe / Common green tree frog (Litoria caerulea) in rainforest, Iron Range National Park, Cape York Peninsula, North Queensland, Australia, October

Solvin Zankl / European tree frog (Hyla arborea) on tree branch, with lake behind, Germany