MYN / JP Lawrence / Lovely poison frog (Phyllobates lugubris) male with a tadpole, Isla Colon, Panama, June. Meetyourneighbours.net project

MYN / Paul van Hoof / Common spadefoot toad (Pelobates fuscus) composite showing metamorphosis from larva to adult, The Netherlands, meetyourneighbours.net project

Chris Mattison / Spotted reed frog (Hyperolius pucticulatus) tadpoles, captive, endemic to Tanzania.

Barrie Britton / Wasp (Ropalidia species) attacking Mantellid Frog Tadpoles (Guibemantis species) on leaf overhanging pond. Tadpoles escape by dropping into water. Association Mitsinjo Reserve, Andasibe, Madagascar....

Barrie Britton / Mantellid Frog Tadpoles (Guibemantis species) developing on leaf overhanging pond. Association Mitsinjo Reserve, Andasibe, Madagascar. Photograph taken on location for BBC 'Wild Madagascar' Series,...

Solvin Zankl / Lars Hendrickson watching Black piston water beetles (Hydrophilus aterrimus) feeding on a tadpole, State Collection in Munich, Germany, June

Philippe Clement / Common Frog (Rana temporaria) tadpole with limbs well developed but tail not yet reabsorbed, Belgium, captive

Solvin Zankl / Desert / Longtail tadpole shrimp {Triops longicaudatus}

Jane Burton / Common Frog (Rana temporaria) tadpoles developing in spawn

Kim Taylor / Great crested newt tadpole {Triturus cristatus} UK.

Barry Mansell / Pinewoods tree frog tadpole mimicing leaf {Hyla femoralis}

Fabio Liverani / Common tree froglet {Hyla arborea} tadpole with front and back legs, Italy

Fabio Liverani / Common tree frog {Hyla arborea} tadpole, Italy

Fabio Liverani / European Edible Frog froglets with tadpole tails. Italy

Fabio Liverani / Common tree frog tadpole with hind legs and front legs developing, Italy. Life cycle sequence 4

Fabio Liverani / Yellow bellied toad - eggs with developing embryos, Italy. Life cycle sequence 2

Adrian Davies / Common frog tadpole (Rana temporaria), semi albino (c. 7 weeks). England, UK, Europe

Juergen Freund / Common frog tadpole in egg. (Rana temporaria) Germany

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

Pete Oxford / Anthony's Poison Arrow Frog (Epipedobates anthonyi) male carrying tadpoles, native to South America

Michael & Patricia Fogden / Red-eyed Tree Frog (Agalychnis callidryas) tadpoles in rain water pond, Costa Rica

Piotr Naskrecki / Three-striped Poison Dart Frog (Ameerega trivittata) male carrying tadpoles, Suriname

Piotr Naskrecki / Three-striped Poison Dart Frog (Ameerega trivittata) male carrying tadpoles, Suriname

Mark Moffett / Golden Poison Dart Frog (Phyllobates terribilis) the most poisonous of the dart frogs, male carrying tadpoles on his back, Colombia

Mark Moffett / Strawberry Poison Dart Frog (Oophaga pumilio) mother deposits tadpoles, one by one, to pools of water in canopy bromeliad, scattering them among the trees, Bastimentos Island, Bocas del Toro, Panama

Konrad Wothe / Tadpoles swimming in mountain pond, Italy, Europe. June.

Georgette Douwma / Common frog (Rana temporaria) tadpoles overwintering in the water. They will metamorphose the next season, London, England, UK. April.

Georgette Douwma / Common frog (Rana temporaria) tadpoles feeding on Common garden snail (Helix aspersa) which has fallen in the water; small pond snails on its shell, London, England, UK. May.

Georgette Douwma / Common frog tadpole (Rana temporaria) with hind legs just developing, with Mosquito larvae (Culex pipiens), London, England, UK. May.

Georgette Douwma / Common froglet (Rana temporaria), with front and hind legs visible and the tail almost gone, London, England, UK. June.

Georgette Douwma / Common frog tadpoles (Rana temporaria). One tadpole has developed front and hind legs, London, England, UK. June.

Georgette Douwma / Common frog tadpoles (Rana temporaria). The largest tadpole had overwintered in the water and has just started to develop hind legs. Not all tadpoles turn into frogs in the same year they hatch; some...

Georgette Douwma / Three Common frog tadpoles (Rana temporaria) on a lilypad, London, England, UK. April.

Chris Mattison / Asian horned frog (Megophrys nasuta) tadpole swimming amongst aquatic plants.

Chris Mattison / Developing eggs of Spotted reed frog (Hyperolius puncticulatus) at day 8, just prior to hatching.

Robert Valentic / Spotted marsh frog tadpole (Limnodynastes tasmaniensis) from a farm dam at Donnybrook, Melbourne, Australia. Controlled conditions.

Nick Upton / Common European toad (Bufo bufo) tadpoles swimming in a heathland pond, viewed from above, Dorset, UK, May

Nick Upton / Common European toad (Bufo bufo) tadpoles swimming in a heathland pond, viewed from above, Dorset, UK, May