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

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

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

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.

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.

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.

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