Doug Perrine / Humpback whale calf breaching {Megaptera novaeangliae} Hawaii, Pacific Ocean - taken under research permit #587. Breaching beahviour is thought to dislodge external skin parasites. (Non-ex).

Martha Holmes / Sediment rising from the sea bed as a result of a bottlenose dolphin (Tursiops truncatus) beating its tail down to trap fish. Beahviour known as mud-ringing. Florida Bay, USA. August 2008. Taken on...

Martha Holmes / Sediment rising from the sea bed as a result of a bottlenose dolphin (Tursiops truncatus) beating its tail down to trap fish. Beahviour known as mud-ringing. Florida Bay, USA. August 2008. Taken on...

Brent Stephenson / Arctic Fox (Alopex / Vulpes lagopus) protecting its kill in a rock cave. Diskobukta, Svalbard, July.

Andy Rouse / RF- Gentoo penguins (Pygoscelis papus papus) landing on beach, Falkland Islands. (This image may be licensed either as rights managed or royalty free.)

Suzi Eszterhas / Spotted Hyena {Crocuta crocuta} watching Jackal scavenging hyena vomit at communal den, Masai Mara, Conservancy, Kenya

TJ Rich / Newborn wildebeest suckling mother {Connochaetes taurinus} Masai Mara, Kenya, Africa

Fabio Liverani / Green toad {Bufo viridis} pair in amplexus Italy

WILLIAM OSBORN / Male coot incubating eggs on nest (Fulica atra) UK

Hans Christoph Kappel / Poplar Admiral caterpillar (Limenitis populi) feeding on twig, Germany

Phil Chapman / White / Fairy Tern (Gygis alba) perched on branch next to single egg, Henderson Island. The chick must hatch and grow to fledging without once toppling off its perch. If it falls it will be eaten by...