Alex Hyde / Bullseye / Io moth (Automeris io) showing eye spot markings on wings during deimatic display to deter predators, originating from North and Central America, sequence 2 of 2. Captive.

Konrad Wothe / Orang-Utan (Pongo pygmaeus) lowering itself from a branch head-first into water. Gunung Leuser National Park, Sumatra.

Gerrit Vyn / Tennessee Warbler (Vermivora peregrina) male perched in a pine tree branch, singing in spring, Cold Lake, Edmonton, Alberta, Canada. May.

John Cancalosi / Red-winged Blackbird (Agelaius phoeniceus) male calling. New York, USA, May.

Roger Powell / Northern gannet (Morus bassanus) preparing to take off, Great Saltee Island, Wexford, Republic of Ireland, June

Erlend Haarberg / Two male Great snipe (Gallinago media) displaying, Norway, June

Erlend Haarberg / Male Great snipe (Gallinago media) displaying, Norway, May

Erlend Haarberg / Male Great snipe (Gallinago media) displaying, Norway, May

Erlend Haarberg / Male Barrow's goldeneye (Bucephala islandica) on water displaying, Iceland, June

Roland Seitre / Two Great Green / Buffon's Macaw (Ara ambiguus) playing on branch. Boca Tapada, Biological Corridor San Juan La Selva, Costa Rica. 2008.

Alex Hyde / Bullseye / Io moth (Automeris io) showing eye spot markings on wings during deimatic display to deter predators, originating from North and Central America, sequence 2 of 2. Captive.

Roger Powell / Northern gannet (Morus bassanus) sky-pointing, signalling that it wants to take-off from the colony, Great Saltee island, Wexford, Republic of Ireland, June

Roger Powell / Northern gannets (Morus bassanus) engaged in bill-fencing courtship display, Great Saltee island, Wexford, Republic of Ireland, June

Hermann Brehm / Two Great crested grebe (Podiceps cristatus) courtship display with pondweed in their beaks. Coot in background. Bavaria, Germany, March.

Shattil & Rozinski / Swift fox (Vulpes velox) mother and cub playing, prairie grasslands, Southern Wyoming, USA

Shattil & Rozinski / Swift fox (Vulpes velox) cubs playing, Wyoming, USA

Steve Knell / Northern gannets (Morus bassanus) displaying in colony, Saltee Islands, County Wexford, Republic of Ireland, May

Kerstin Hinze / Common Crane (Grus grus) juvenile and two adult calling, displaying, in harvested corn fields in the Rgen-Bock-Region in autumn before they continue their annual journey to the south, Mecklenburg West...

Steve Knell / Horned / Slavonian grebe {Podiceps auritus} male displaying, Sweden, 2006

John Cancalosi / Red winged Blackbird {Agelaius phoeniceus} male singing, NY, USA

John Cancalosi / Red-winged Blackbird {Agelaius phoeniceus} male courtship display, NY, USA

Bernard Castelein / Blue footed booby pair sky pointing, part of mating dance ritual {Sula nebouxii excisa} Galapagos

Shattil & Rozinski / Red winged blackbird displaying {Agelaius phoeniceus} Colorado, USA

Tom Vezo / Great Blue Heron {Ardea herodias} courtship display, Florida, USA.

DAVID TIPLING / Great bustard {Otis tarda} young male displaying, Extremadura, Spain.

DAVID TIPLING / Great bustard {Otis tarda} male displaying, Extremadura, Spain.

DAVID TIPLING / Great bustard {Otis tarda} young male displaying, Extremadura, Spain.

Juergen Freund / Bearded ghoul fish / Demon stinger displays pectoral fins when threatened {Inimicus didactylus} Indo-Pacific

Mike Read / Blue footed booby sky pointing display {Sula nebouxii} Galapagos

TJ Rich / Cheetah (Acionyx jubatus) juvenile exploring warthog hole, Masai Mara Reserve, Kenya

TJ Rich / Cheetah (Acionyx jubatus) mother and juveniles playing, Masai Mara Reserve, Kenya

TJ Rich / Cheetah (Acionyx jubatus) mother and juveniles playing, Masai Mara Reserve, Kenya