Alex Hyde / Close-up of compound eyes of unidentified fly {Diptera}. Masoala Peninsula National Park, north east Madagascar.

Jeff Rotman / Jewel Grouper / Coral hind (Cephalopholis Miniata) with mouth open, Red Sea, Egypt

Edwin Giesbers / Head portrait of Sumatran tiger (Panthera tigris sumatrae) with face half cast in shadow, and mouth open, captive

Stephen Dalton / Green cat snake (Boiga cyanea) striking, a rear-fanged arboreal rainforest species, controlled conditions, from India and SE Asia

Stephen Dalton / Brown rat {Rattus norvegicus} backlit, night, controlled conditions, UK

Barry Mansell / Neotropical Fruit Bat (Aritbeus hartii) in flight at night, Tamaulipas, Mexico

Doug Perrine / Close up of teeth and mouth of Salmon shark {Lamna ditropis} captive, Prince William Sound, Alaska, USA (digitally edited)

Rick Tomlinson / Melges 32 "Nightmare" rounding the windward mark during a race at the 2009 Acura Miami Grand Prix, day 3, 7th March.

David Shale / Gaping mouth of Angler Fish (Chaenophryne draco). Near Cape Verde, Atlantic Ocean.

Jeff Rotman / Black blotched pufferfish (Diodon liturosus) inflated with water at night as defensive behaviour, Sipadan Island, Borneo, Malaysia.

Markus Varesvuo / Golden Eagle (Aquila chrysaetos) chasing Ravens (Corvus corax) above snow. Utajsrvi, Finland, January. Magic Moments book plate, page 134.

Paul D Stewart / Illustration of 'The effects of a hearty dinner after visiting the Antediluvian Department at the Crystal Palace' from Punch, Volume 28, 1855. The restorations of dinosaurs at the Crystal Palace in Sy...