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.

Christophe Courteau / Male BurchellÕs zebra (Equus quagga burchellii) pulling the head of a dead pregnant female that died due to complications whilst giving birth, trying to wake her up, Etosha National Park, Namibia. Par...

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

Floris van Breugel / Two Bull Northern Elephant Seals (Mirounga angustirostris) face off before fighting in the middle of the extensive Piedras Blancas rookery with over 150 seals just in this photo, mostly pregnant or nu...

Christophe Courteau / Jaguar (Panthera onca palustris) wild pregnant female, in undergrowth beside the Cuiaba River, Pantanal, Mato Grosso, Brazil, September 2008. This individual is called BORBOLETTA by researchers (pho...

Christophe Courteau / Jaguar (Panthera onca palustris) wild pregnant female, in undergrowth beside the Cuiaba River, Pantanal, Mato Grosso, Brazil, September 2008 This individual is called BORBOLETTA by researchers (phot...

Ann & Steve Toon / Meerkat / Suricate (Suricata suricatta) pregnant female standing on hind legs, with swollen abdomen exposed, Kgalagadi Transfrontier Park, South Africa

Wild Wonders of Europe / Nill / Mehely's Horseshoe Bat (Rhinolophus mehelyi) pregnant female flies from cave near Nikopol Bulgaria, May 2008

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