Mark Taylor / Two baby Hedgehogs (Erinaceus europaeus) portrait, helpless and with eyes shut.

Jabruson / African bullfrog {Pyxicephalus flavigula} eating mouse. Tsavo East NP, Kenya

Mark Taylor / Four baby Hedgehogs (Erinaceus europaeus) portrait, helpless and with eyes shut.

Mark Taylor / Baby Hedgehog (Erinaceus europaeus) portrait, helpless and with eyes shut.

Steven Kazlowski / Brunnich's guillemot (Uria lomvia) chick amidst rocks after falling from a steep cliff, Sassenfjorden, along the coast of Svalbard, Norway,

Paul Hobson / Hedgehog (Erinaceus europaeus) young orphan feeding at rescue centre, Shefield, England

Doug Wechsler / American Toad tadpoles (Bufo americanus) just hatched, Philadelphia, USA

Doug Wechsler / American Toad tadpoles (Bufo americanus) five days after hatching, Philadelphia, USA

Piotr Naskrecki / Pillbug (Armadillidium sp) on its back, Woburn, Massachusetts

Michael Hutchinson / Little Grebe (Tachybaptus ruficollis) chick calling with beak open and wings up, Derbyshire, UK

Karl Ammann / Family watch as crocodile lies tied and helpless ready for the market, for sale as bushmeat, Central Africa. Crocodiles are transported alive, often for weeks without food or water, and sold fresh in...

Silvia Reiche / Common Cockchafer (Melolontha melolontha) lying on its back, Saint-Jory-las-Bloux, Dordogne, France