Stephen Dalton / Wallace's flying frog (Rhacophorus nigropalmatus) gliding from tree, controlled conditions, from Malaysia and Indonesia

Bruce Thomson / Crucifix toad / Holy cross frog (Notaden bennetti) sitting in shallow water after heavy summer rain, Westmar, Queensland, Australia.

Bence Mate / Bittern (Botaurus stellaris) with marsh frog (Rana ridibundus) that has just woken up from hibernation, Kiskunsag National Park, Hungary. Honoured in the Montier Photo Awards 2020.

Guy Edwardes / Marsh Frog (Pelophylax ridibundus) vocalising with bokeh effect in the background, Danube Wetlands, Bulgaria

Guy Edwardes / Marsh Frog (Pelophylax ridibundus) vocalising with bokeh effect in the background, Danube Wetlands, Bulgaria

Theo Bosboom / Edible frog (Pelophylax k. esculentus) catching a common blue damselfly (Enallagma cyathigerum) with its tongue with pair mating on stem above, Hondenven, Tubbergen, The Netherlands, July.

Nick Garbutt / Montane Glass Frog (Centrolenella ilex) inside curled leaf. Mid-altitude rainforest, Bosque de Paz, Pacific slope, Costa Rica, Central America.

Nick Garbutt / Green-and-Black Poison Dart Frog (Dendrobates auratus) inside bromiliad where it breeds. Boca Tapada, Caribbean slope, Costa Rica, Central America.

Nick Garbutt / Emerald Glass Frog (Centrolenella proseblepan) on leaf. Mid-altitude rainforest, Bosque de Paz, Pacific slope, Costa Rica, Central America.

Nick Garbutt / Female Red-eyed Tree Frog (Agalychnis callidryas) - Caribbean slope race (blue flanks) - obscured in rainforest foliage. Mid-altitude rainforest near Aranal, central Costa Rica.

Laurent Geslin / European edible frog (Rana esculenta) in urban park, next to pond with buildings in distance, Grenoble, France, May.

Alex Hyde / Spined glassfrog (Teratohyla spinosa) Central Caribbean foothills, Costa Rica.

Alex Hyde / Lemur leaf frog (Agalychnis lemur) Central Caribbean foothills, Costa Rica. IUCN Red List critically endangered species.

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

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.

Aflo / Frog (Rhacophorus schlegelii) in Hydrangea leaves, Shimane, Japan. August.

Gabriel Rojo / White-banded tree-frog (Hypsiboas pulchellus) with Ladybird (Coccinellidae) Calden forest, La Pampa, Argentina

Wild Wonders of Europe / Lundgren / Pool Frog (Pelophylax lessonae) viewed from below while swimming, underwater around Crisan village, Danube Delta, Romania, June.

Wild Wonders of Europe / Lundgren / Pool frog (Pelophylax lessonae) reflected in waters surface at night, Danube Delta, Romania, June.

Chris Mattison / Barred leaf frog (Phyllomedusa tomopterna) captive from South America.

Ingo Arndt / Red-eyed tree frog (Agalychnis callidryas) eye closed with semi-transparent eyelid that allows it to see its surroundings even while resting, Costa Rica.

Ingo Arndt / Red-eyed Tree Frog (Agalychnis callidryas) close- up of eye half open, the golden webbed semi-transparent eyelid allows to see its surrounding even while resting, Costa Rica.

Visuals Unlimited / Emerald Glass Frog (Centrolenella prosoblepon), sitting within leaf tunnel, Costa Rica.

Theo Bosboom,Theo Bosboom / Green frog (Rana esculente) hiding in reeds Hondeven fen, east Holland, August

Michael D. Kern / Waxy monkey tree frog (Phyllomedusa sauvagii) captive, from Central and South America

Michael D. Kern / Maroon eye / Moon frog (Leptopelis uluguruensis) captive, from East Africa

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

Nature Production / Japanese tree frog (Hyla japonica) hanging from Pumpkin flower, Japan

Nature Production / Japanese tree frog (Hyla japonica) climbing up onto hydrangea leaf, Fukuoka, Japan, August, sequence 1/3

Pete Oxford / Portrait of an Emerald Glass Frog (Espadarana / Centrolenella prosoblepon). Captive. Choc??gion of northwest Ecuador.

Visuals Unlimited / Triangle / Clown Tree Frog (Hyla triangulum), Iquitos, Peru

Pete Oxford / Giant leaf frog (Phyllomedusa bicolor) climbing along branch in rainforest, Iwokrama Reserve, Guyana

Bence Mate / Head portrait of Satiny Parrot snake (Leptophis depressirostris) swallowing frog, Hungary, Europe

Tim Laman / Wallace's flying frog (Rhacophorus nigropalmatus) on a tree trunk in the lowland rainforest, Danum Valley Conservation Area, Sabah, Borneo, Malaysia.

Michael D. Kern / Zoo Atlanta / Lemur leaf frog (Hylomantis lemur) mating pair, captive, Critically endangered, from Central America

Michael D. Kern / Zoo Atlanta / White-spotted leaf frog (Cochranella albomaculata) captive, from Central America. Please credit Michael Kern / Zoo Atlanta.

Stephen Dalton / Green mosaic / Rancho grande harlequin frog (Atelopus cruciger) walking along tree trunk, Henri Pittier NP, Venezuela, South America, Critically endangered, thought extinct until a gravid female was f...

Stephen Dalton / Common frog {Rana temporaria} froglet sitting on lily pad in water, UK

Stephen Dalton / Common / European treefrog {Hyla arborea} jumping sequence, multiflash image, controlled conditions

Stephen Dalton / Wallace's / Abah river flying frog (Rhacophorus nigropalmatus) gliding, controlled conditions, showing use of webbed feet, from Malaysia and Indonesia

Robert Thompson / Red-eyed tree frog {Agalychnis callidryas} resting in Bromeliad flower, Nicaragua, June

Edwin Giesbers / Common tree frog {Hyla arborea} on vegetation, the Netherlands

Edwin Giesbers / Green / European edible frog {Rana esculenta} in water, the Netherlands