Stephen Dalton / Wallace's flying frog (Rhacophorus nigropalmatus) gliding from tree, controlled conditions, from Malaysia and Indonesia

Tony Wu / Siberian flying squirrel (Pteromys volans orii) gliding through forest in early morning. Hokkaido, Japan. February.

Tony Wu / Siberian flying squirrel (Pteromys volans orii), usually nocturnal, gliding through forest. Diurnal activity like this is not common, probably adaptation to presence of pair of Ural owls. Hokkaido, Ja...

Tony Wu / Japanese dwarf flying squirrel (Pteromys volans orii) gliding through snowy forest, Hokkaido, Japan.

David Fleetham / Great white shark (Carcharodon carcharias) dorsal fin visible on surface. Guadalupe Island, Mexico.

Claudio Contreras / Hawksbill turtle (Eretmochelys imbricata) swimming, viewed from below, Cozumel Reefs National Park, Cozumel Island, Yucatan Peninsula, Mexico, February

Andy Rouse / Great egret (Ardea alba) flying across lake, Ranthambhore National Park, India

Ernie Janes / Fulmar (Fulmaris glacialis) in flight with Hunstanton, Norfolk, England, UK, February.

Ole Jorgen Liodden / Campbell albatross (Thalassarche impavida) in flight, silhouetted at sunset, near Campbell Islands, Sub-Antarctic New Zealand. February.

Ole Jorgen Liodden / Campbell albatross (Thalassarche impavida) in flight, silhouetted at sunset, near Campbell Islands, Sub-Antarctic New Zealand. February.

Jack Dykinga / Male Andean Condor (Vultur gryphus) flying amongst the clouds, Los Cuernos Peaks, Torres del Paine, Chile. March.

Will Burrard-Lucas / Red and White Giant Flying Squirrel (Petaurista alborufus) gliding, Foping Nature Reserve, Qinling Mountains, Shaanxi province, China.

Konrad Wothe / Gliding seed of Climbing Gourd (Alsomitra macrocarpa) in tropical rainforest, West Papua, New Guinea, Indonesia, digital composite

Juan Carlos Munoz / Bearded vulture (Gypaetus barbatus) in flight over Simien Mountains, Ethiopia

Andy Rouse,Andy Rouse / Aerial view of Lesser Flamingos (Phoenicopterus / Phoeniconaias minor) in flight. Lake Magadi, Kenya.

Solvin Zankl / Close up of ant (Cephalotes clypeatus) Specimen photographed using digital focus stacking

Brent Stephenson / Buller's shearwater (Puffinus bulleri) in flight low over the water, showing upperwing. Off Whitianga, Coromandel Peninsula, New Zealand.

Andy Rouse / Manta ray (Manta birostris) swimming on ocean floor Coral Bay, Australia

Nick Garbutt / Wallace's Flying frog (Rhacophorus nigropalmatus) male from lowland dipterocarp rainforest, Danum Valley, Sabah, Borneo. Photographed in situ in makeshift studio in the forest.

Nick Garbutt / Wallace's flying frog (Rhacophorus nigropalmatus) male from lowland dipterocarp rainforest, Danum Valley, Sabah, Borneo. Photographed in situ in makeshift studio in the forest.

Andrew Parkinson / Mute swan (Cygnus olor) adult emerges serenely from a thick mist into dawn sunlight, Derbyshire, UK, May.

Charlie Summers / Three Snow Geese banking and gliding in preparation for a landing (Chen caerulescens). Bosque del Apache, New Mexico, January.

Tim Laman / Wallace's flying frog (Rhacophorus nigropalmatus) on a tree trunk in the lowland rainforest, Danum Valley Conservation Area, Sabah, Borneo, Malaysia.

Tim Laman / Wallace's flying frog (Rhacophorus nigropalmatus) on tree trunk in lowland rainforest showing webbed feet, Danum Valley Conservation Area, Sabah, Borneo, Malaysia

Tim Laman / Harlequin Tree Frog (Rhacophorus pardalis) in the air with webbed feet spread to glide, Danum Valley Conservation Area, Sabah, Borneo, Malaysia

Stephen Dalton / Jade tree frog (Rhacophorus dulitensis) gliding between trees, controlled conditions

Stephen Dalton / Wallace's gliding frog (Rhacophorus nigropalmatus) flying, controlled conditions

Stephen Dalton / Wallace's gliding frog (Rhacophorus nigropalmatus) flying, controlled conditions

Stephen Dalton / Flying / Parachute gecko (Ptychozoon sp) gliding, controlled conditions

Stephen Dalton / Flying lizard (Draco volans) gliding, controlled conditions, from Indonesia

Stephen Dalton / Wallace's flying frog (Rhacophorus nigropalmatus) gliding from tree, controlled conditions, from Malaysia and Indonesia

Stephen Dalton / Flying lizard (Draco volans) gliding, controlled conditions, from Indonesia

Stephen Dalton / Northern flying squirrel {Glaucomys sabrinus} gliding, controlled conditions, native to North America

Stephen Dalton / Wallace's flying frog (Rhacophorus nigropalmatus) leaping, controlled conditions, from Asia

Stephen Dalton / Wallace's / Abah river flying frog (Rhacophorus nigropalmatus) gliding, controlled conditions, showing use of webbed feet, from Malaysia and Indonesia

Gary K. Smith / Marsh Harrier (Circus aeruginosus) male bird in flight over reed bed, Norfolk, UK, March

Mark Carwardine / Java gliding / Malaysian flying frog (Rhacophorus reinwardti) captive, from South east Asia rainforests

Nick Garbutt / Wallace's gliding frog (Rhacophorus nigropalmatus) with head peering out from behind leaf. Danum Valley, Sabah, Borneo

Nick Garbutt / Wallace's flying / gliding frog {Rhacophorus nigropalmatus} in flight, gliding down from canopy, Danum Valley, Sabah, Borneo.

Nick Garbutt / RF- Wallace's flying / gliding frog (Rhacophorus nigropalmatus) perching on understorey vegetation at night, Danum Valley, Sabah, Borneo. (This image may be licensed either as rights managed or royalt...

Nick Garbutt / Wallace's flying / gliding frog {Rhacophorus nigropalmatus} portrait perching on vegetation, Danum Valley, Sabah, Borneo.

Tim MacMillan / John Downer Pr / Multiple exposure study of various frogs gliding. Those with more webbing between their toes glide further (Resolution restriction - image digitised from film, 'Weird Nature' tv series)

Stephen Downer / John Downer P / Sidewinder rattlesnake corkscrews along sand, wave of contact points passes along body (Resolution restriction - image digitised from film, 'Weird Nature' tv series)

Tim MacMillan / John Downer Pr / Kuhl's gecko flying - every edge of body expanded into membrane that acts as a wing as it glides (Resolution restriction - image digitised from film, 'Weird Nature' tv series)

Tim MacMillan / John Downer Pr / Multiple exposure study of various frogs shows that those with more foot webbing glide further (Resolution restriction - image digitised from film, 'Weird Nature' tv series)

Tim MacMillan / John Downer Pr / Wallace's gliding frog's extensive foot webbing allows it to glide long distances (Resolution restriction - image digitised from film, 'Weird Nature' tv series)

Neil Lucas / Horned viper {Cerastes cerastes} gliding sidewinding on sand dune, Morocco.