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

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.

SINCLAIR STAMMERS / Timelapse of filaments of Oscillatoria, a type of Blue green algae gliding over each other, filmed using differential interference contrast.

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.

Chien Lee / Flying Fish (Exocoetidae) taking flight from surface, Sarawak, Borneo, Malaysia

Chien Lee / Wallace's Flying Frog (Rhacophorus nigropalmatus) gliding, Danum Valley Field Center, Sabah, Borneo, Malaysia

Donald M. Jones / Canada Goose (Branta canadensis) flying, central Montana