Morley Read / Leaf frog (Agalychnis hulli) blinking its eyes, Amazon rainforest, Orellana Province, Ecuador. (non-ex)

Morley Read / Leaf frog (Agalychnis hulli) blinking its eyes, Amazon rainforest, Orellana Province, Ecuador. (non-ex)

Morley Read / Map treefrog (Boana geographica) blinking, Amazon rainforest, Orellana Province, Ecuador. (non-ex)

Morley Read / Clown treefrog (Dendropsophus reticulatus) opening its eyes, Amazon rainforest, Orellana Province, Ecuador. (non-ex)

Morley Read / Slow motion clip of a South American common toad (Rhinella margaritifera) leaping, Orellana Province, Ecuadorian Amazon. (non-ex)

Morley Read / Close-up portrait of a South American common toad (Rhinella margaritifera) amongst leaf litter, Orellana Province, Ecuadorian Amazon. (non-ex)

Morley Read / Slow motion clip of a Guacamayo plump toad (Osornophryne guacamayo) walking, Orellana Province, Ecuador. (non-ex)

Morley Read / Slow motion clip of a Leaf frog (Cruziohyla craspedopus) jumping from a Calathea plant, Amazon rainforest, Ecuador. (non-ex)

Morley Read / Slow motion clip of a Leaf frog (Cruziohyla craspedopus) walking, Ecuador. (non-ex)

Morley Read / Slow motion clip of a Leaf frog (Cruziohyla craspedopus) turning around, Ecuador. (non-ex)

Morley Read / Slow motion clip of a Leaf frog (Cruziohyla craspedopus) leaping, Ecuador. (non-ex)

Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 18 days development, the tadpoles are fully developed and ready to hatch, Ecuador. Endangered. (non-ex)

Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 11 days development, showing beating heart and blood flowing over gills, Ecuador. Endangered. (non-ex)

Morley Read / Rio Faisanes stubfoot toad (Atelopus coynei), Carchi Province, Ecuador, 2017. Critically endangered. (non-ex)

John Cancalosi / Sonoran desert toad (Incilius alvarius) pair mating, with trail of spawn in water. Arizona, USA.

Yashpal Rathore / Small tree frog (Rhacophorus lateralis) at night under starry sky, Western Ghats. India. Endangered and endemic to Western Ghats.

Lucas Bustamante / Labiated rainfrog (Pristimantis labiosus) feeding on spider prey, Mashpi, Pichincha, Ecuador

Lucas Bustamante / Lesser Clownfrogs (Dendropsophus parviceps) with their eggs. Sumaco National Park, Napo, Ecuador

Edwin Giesbers / Lemon-yellow tree frog (Hyla savignyi) climbing up grass stem. Cyprus. April.

Edwin Giesbers / Lemon-yellow tree frog (Hyla savignyi) Cyprus. April.

Morley Read / Leaf frog (Agalychnis hulli) blinking its eyes and turning around, Orellana Province, Ecuador. (non-ex)

Morley Read / Developing embryo of the Ecuadorian monkey frog (Phyllomedusa ecuatoriana), showing heart beating and blood flowing, Morona Santiago Province, Ecuador, (non-ex)

Morley Read / Close-up of an Amazon leaf frog (Cruziohyla Craspedopus) tadpole developing in egg, Ecuador. (non-ex)

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

Claudio Contreras / Broadfoot mushroomtongue salamander (Bolitoglossa platydactyla), Catemaco Lake, Los Tuxtlas Rainforest, Mexico, July

Thomas Marent / Splendid Poison Dart Frog (Dendrobates sylvaticus) in rainforest, Timbiqui, Colombia

Thomas Marent / Golden Poison Dart Frog (Phyllobates terribilis) in rainforest, Timbiqui, Colombia

Thomas Marent / Buckley's Slender-legged Treefrog (Osteocephalus buckleyi), Putumayo, Colombia

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

John Cancalosi / American toads (Anaxyrus americanus), several males competing to mate with female, Maryland, USA, April.

Kerstin Hinze / Male Common european toad (Bufo bufo) in amplexus with a dead fish, Lower Saxony, Germany, April.

Emanuele Biggi / Peruvian Tarantula (Pamphobeteus sp.) and Humming Frog (Chiasmocleis royi) together, Los Amigos Biological Station, Madre de Dios, Amazonia, Peru. These species have a commensal relationship. The tara...

Emanuele Biggi / Peruvian Tarantula (Pamphobeteus sp.) adult, walking over Humming Frog (Chiasmocleis royi) without preying on it. Los Amigos Biological Station, Madre de Dios, Amazonia, Peru. These species have a com...

Piotr Naskrecki / Painted Reed Frog (Hyperolius marmoratus) being eaten by Fishing Spider (Pisauridae), Gorongosa National Park, Mozambique

Piotr Naskrecki / Red-eyed Tree Frog (Agalychnis callidryas), Belize

Staffan Widstrand / Wild Wonders of China / Tree frog (Amolops afghanus) female sitting on moss Tongbiguan Nature Reserve, Dehong prefecture, Yunnan province, China, May.

Remi Masson / Common toads (Bufo bufo) mating surrounded by strings of toadspawn. Ain, Alps, France. First prize in the category "The Underwater World, GDT European Wildlife Photographer of the Year 2014 competiti...

Remi Masson / Male Common toads (Bufo bufo) fighting underwater during mating season, with a pair mating Ain, Rhone-Alps, France, March.

Chien Lee / Minden / Black-headed Cat Snake (Boiga nigriceps) swallowing alive Harlequin Flying Tree Frog (Rhacophorus pardalis) prey, Kubah National Park, Sarawak, Malaysia, sequence 1 of 4

John Waters / Male Common European toad (Bufo bufo) approaching female at surface, Priddy, Somerset, England, UK, April.

John Waters / Wide-angle shot of a pair of Common European toads (Bufo bufo) in amplexus, jumping into a pond, Priddy, Somerset, England, UK, April.

Chien Lee / Rough Tree Frog (Theloderma horridum) camouflaged on bark, Kuching, Sarawak, Borneo, Malaysia

Steve Downer / Timelapse of Common frog (Rana temporaria) tadpoles moving, UK, April. Captive.

Steve Downer / Timelapse of Common frog (Rana temporaria) tadpoles moving, UK, April. Captive.

Steve Downer / Juvenile Common frog (Rana temporaria) on back of a Common snail (Cornu aspersum), UK, June.

Steve Downer / Juvenile Common frog (Rana temporaria) on back of a Common snail (Cornu aspersum), UK, June.

Steve Downer / Common frog (Rana temporaria) underwater with frogspawn, UK, March. Controlled conditions

Steve Downer / Newly hatched Common frog (Rana temporaria) tadpoles feeding on egg cases, UK, March. Controlled conditions.

Chien Lee / Harlequin Poison Dart Frog (Dendrobates histrionicus), Utria National Park, Colombia

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

Chien Lee / Kobayashi's Horned Frog (Megophrys kobayashii), Kinabalu National Park, Sabah, Malaysia

Chien Lee / Borneo Opposite-fingered Tree Frog (Chiromantis inexpectatus), new species, Maliau Basin, Sabah, Malaysia

Chien Lee / Masked Treefrog (Rhacophorus angulirostris) male, Kinabalu National Park, Sabah, Malaysia

Chien Lee / Bornean Smaller Flying Frog (Rhacophorus borneensis), Kubah National Park, Sarawak, Malaysia

Chien Lee / Painted Indonesian Treefrog (Nyctixalus pictus), Lundu, Sarawak, Malaysia

Chien Lee / Kokoe Poison Dart Frog (Phyllobates aurotaenia), Utria National Park, Colombia

Chien Lee / Condoto Stubfoot Toad (Atelopus spurrelli), Utria National Park, Colombia

Chien Lee / Amazon Horned Frog (Ceratophrys cornuta), Yasuni National Park, Ecuador

Chien Lee / Amazon Horned Frog (Ceratophrys cornuta) camouflaged in leaf litter, Yasuni National Park, Ecuador

Chien Lee / Amazon Horned Frog (Ceratophrys cornuta), Yasuni National Park, Ecuador

Chien Lee / White-lined Leaf Frog (Phyllomedusa vaillanti) in rainforest, Ecuador

Chien Lee / Golden Mantella (Mantella aurantiaca) in forest, Andasibe, Madagascar

Chien Lee / Golden Mantella (Mantella aurantiaca), Andasibe, Madagascar

Chien Lee / Spike-browed Frog (Sphenophryne cornuta) father transporting froglets, Digul River, West Papua, Indonesia

Chien Lee / Spike-browed Frog (Sphenophryne cornuta) father transporting froglets, Digul River, West Papua, Indonesia

Lucas Bustamante / Moss rainfrog (Pristimantis eriphus) siting on leaf, Cosango, Napo Ecuador, Vulnerable species.

Lucas Bustamante / Troschel's tree frog / Calcar tree / Convict tree frog (Hypsiboas calcaratus) portrait, on leaf, Cuyabeno, Sucumbios, Ecuador.

Lucas Bustamante / Rio pescado harlequin toad (Atelopus balios) pair on branch, female on the left, Azuay, Ecuador, Critically endangered species, possibly extinct.

Lucas Bustamante / Imbabura tree frog (Hypsiboas picturatus) portrait, Canande, Esmeraldas, Ecuador.

Lucas Bustamante / Two Limon glass frogs (Sachatamia ilex) sitting on plant, one above the other, Canande, Esmeraldas.

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.

Brian Bevan / Surinam horned frog (Ceratophrys cornuta) eating a locust, UK. Captive, native to the Americas.

Yashpal Rathore / Kottigehar dancing frog (Micrixalus kottigeharensis) male calling and displaying to attract female by waving foot, Agumbe, Western Ghats, India.

Yashpal Rathore / Kottigehar dancing frog (Micrixalus kottigeharensis) male calling and displaying to attract female by waving foot, Agumbe, Western Ghats, India.

Phil Savoie / Reticulated glass frog (Hyalinobatrachium valerioi) La Selva Field Station, Costa Rica.

Lucas Bustamante / Coastal glassfrog (Cochranella litoralis) on leaf with eggs. San Lorenzo, Esmeraldas, Ecuador.

Agustin Esmoris / Yellow Cururu Toad (Rhinella icterica), Argentina

Paul Bertner / Strawberry Poison Dart Frog (Oophaga pumilio), bastimentos morph, Bastimentos Island, Panama

Paul Bertner / Mantellid Frog (Mantidactylus aglavei), Ranomafana National Park, Madagascar

Paul Bertner / Painted Indonesian Treefrog (Nyctixalus pictus), Bukit Barisan Selatan National Park, Sumatra, Indonesia

John Waters / Timelapse Frogs (Rana temporaria) spawning in garden pond, Somerset, England, UK. March.

Konrad Wothe / Three-striped poison frog (Ameerega trivittata) croaking, Panguana Reserve, Huanuco Region, Peru.

Alastair MacEwen / Time-lapse of toadspawn from a Common toad (Bufo bufo) developing, emerging and feeding on nutrient jelly, Somerset, England, UK, April.

Alastair MacEwen / Close up time-lapse of frogspawn from a Common frog (Rana temporaria) developing, emerging and feeding on nutrient jelly, Somerset, England, UK, April.

Alastair MacEwen / Time-lapse of frogspawn from a Common frog (Rana temporaria) developing, Somerset, England, UK, April.

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.

Chien Lee / Asian Horned Frog (Megophrys nasuta) female, Gunung Penrissen, Sarawak, Borneo, Malaysia

Chien Lee / Wallace's Flying Frog (Rhacophorus nigropalmatus), Gunung Penrissen, Sarawak, Borneo, Malaysia

Yashpal Rathore / Jayarami Bush frog (Raorchestes jayarami), inflating vocal sac, calling to attract mate, Endemic to Western Ghats. Anamalai Wildlife Sanctuary, India.

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

Nick Hawkins / Red-eyed treefrog (Agalychnis calidryas) Costa Rica, April 2015.

Neil Aldridge / Angolan reed frog (Hyperolius parallelus) resting on a reed stem in the heart of the Okavango Delta, northern Botswana.