Juergen & Christine Sohns / Meerkat (Suricata suricatta) pregnant female and juveniles on alert, Tswalu Game Reserve, South Africa

Juergen & Christine Sohns / Meerkat (Suricata suricatta) pregnant female and juveniles on alert, Tswalu Game Reserve, South Africa

John Cancalosi / Group of gravid female Timber rattlesnakes (Crotalus horridus) basking before giving birth, Pennsylvania, USA, July.

Alex Hyde / Green Dock Beetle (Gastrophysa viridula) female with huge abdomen swollen with eggs. Peak District National Park, Derbyshire, UK. May.

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...

Heidi & Hans-Juergen Koch / Glass Frog (Cochranella antisthenesi) transparent skin shows body filled with eggs, very rare and fragile frog, native to Central and South America

Tui De Roy / Galapagos Land Iguana (Conolophus subcristatus) female searching for descent route into 1, 000 meter active caldera to nest, Fernandina Island, Galapagos Islands, Ecuador

John Cancalosi / Timber rattlesnake (Crotalus horridus) females in undergrowth at maternity site, Pennsylvania, USA. August.

David Hall / Striated frogfish (Antennarius striatus), gravid female and small orange male. Pantar, Indonesia; November, 2006.

Pascal Kobeh / Ornate ghost pipefish (Solenostomus paradoxus), pair feeding near sea floor. Gravid female at front, male behind. Flores Sea, Indonesia.

Loic Poidevin / European mantis (Mantis religiosa) gravid female on flower head, Vendee, France, October.

David Perpinan / Radiography of a captive female red-eared slider (Trachemys scripta) showing eggs within the uterus. Captive animal. Small repro only