Colin Monteath / Humpback Whale (Megaptera novaeangliae) observed by tourists in a zodiac boat near Melchoir Island, Antarctic Peninsula, Antarctica

Konrad Wothe / Cardon (Pachycereus pringlei) cactus photographed by tourist, largest cacti in the world and may live over 200 years, Sonoran Desert, Baja California, Mexico

Norbert Wu / Jellyfish (Periphylla periphylla) being eaten by Anemone (Isotealia antarctica), Antarctica

Flip de Nooyer / Barn Owl (Tyto alba) two juveniles side by side, Europe

Mark Moffett / Giant Weta (Deinacrida heteracantha) female held by researcher Mike Meades, this largest Weta species is found only on Little Barrier Island, New Zealand Weta in hand, New Zealand

Mark Moffett / Giant Weta (Deinacrida heteracantha) female being fed a carrot by researcher Mike Meades, Little Barrier Island, New Zealand

Mitsuaki Iwago / African Elephant (Loxodonta africana) mother and calf walking together side by side, Kenya

Mark Moffett / Herdsman Ant (Dolichoderus cuspidatus) queen surrounded by guards, marches along as the ants shift the site of their nest, Malaysia

Norbert Wu / Atlantic Bluefin Tuna (Thunnus thynnus) examinded with flashlights by buyers to determine the quality of the meat, Tsukiji Market, Tokyo, Japan

Norbert Wu / Spotted Seahorse (Hippocampus erectus) male who has just given birth to babies, surrounded by his offspring

Michio Hoshino / Gray Whale (Eschrichtius robustus) trapped by early freeze up, Alaska

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) group photographed by tourists, Gardner Bay, Hood Island, Galapagos Islands, Ecuador

Tui De Roy / Brown Pelican (Pelecanus occidentalis) feeding chicks by regurgitation in Mangrove (Avicennia sp) nest, Turtle Bay, Santa Cruz Island, Galapagos Islands, Ecuador

Mark Moffett / Burying Beetle (Nicrophorus orbicollis) recycles a dead rat by laying eggs near its body then feeding larvae bits of regurgitated carcass

Norbert Wu / Northern Anchovy (Engraulis mordax) school, feeds by straining water through gills, California

Mark Moffett / Strawberry Poison Dart Frog (Oophaga pumilio) mother deposits tadpoles, one by one, to pools of water in canopy bromeliad, scattering them among the trees, Bastimentos Island, Bocas del Toro, Panama

Flip Nicklin / Vaquita (Phocoena sinus) by-catch casualty, Baja California, Mexico

Anup Shah / African elephant babies with large ears (Loxodonta africana) Masai Mara NR, Kenya

George Sanker / Mature Bighorn Rams (Ovis canadensis) on high mountain pass. Jasper National Park, Alberta, Canada, October.

Gavin Hellier / Former section of Berlin Wall, view from former East Berlin. Also called East Side Gallery because it has been painted by many international artists, Berlin, Germany 2007

Gavin Hellier / Former section of Berlin Wall, view from former East Berlin. Also called East Side Gallery because it has been painted by many international artists, Berlin, Germany 2007

David Pattyn / Dalmatian Pelicans (Pelecanus crispus) portrait. Lake Kerkini, Greece, March 2012.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) two juveniles approaching with curiosity, Tangkoko National Park, Sulawesi, Indonesia.

Kevin Schafer / Sally Lightfoot Crab (Grapsus grapsus) group getting hit by wave, Galapagos Islands, Ecuador

Winfried Wisniewski / White Rhinoceros (Ceratotherium simum) female with calf being watched by safari tourists, Lake Nakuru, Kenya

Yva Momatiuk & John Eastcott / Steller's Sea Lion (Eumetopias jubatus) entangled pup being freed by stewardship students and instructor, Aleutian Islands, Alaska

Christophe Courteau / Side-Striped Jackal (Canis adustus) at night, lit by a spotlight. Okavango Delta, Botswana

ZSSD / California Condor (Gymnogyps californianus) egg handled by keeper, San Diego Zoo, California

ZSSD / Stick Insect held by keeper, San Diego Zoo, California

Yukihiro Fukuda / Lesser frigatebird (Fregata ariel) female and chick at nest on top of shrub near beach, Christmas Island, Indian Ocean, July

Mark Taylor / Two Shar Pei puppies sitting side by side.

Mark Taylor / Black and white Border Collie puppy and black and white rabbit.

Steven Kazlowski / People by the side of lake with mountain reflected. Kenai National Wildlife Refuge, Chugach National Forest, Alaska, May 2012.

Chris Mattison / Detail of patterns on the side of a sand dune caused by wind, Dubai, United Arab Emirates

Stephen Belcher / Yellow Crazy Ant (Anoplolepis gracilipes) colony map looked at by ranger Peter Smith, Christmas Island National Park, Christmas Island, Australia

Michel Poinsignon / Starlings (Sturnus vulgaris), adults perched on branch in winter feeding on apple. Lorraine France. 3rd Prize in the Melvita Nature Images Awards competition 2013.

Mark Moffett / Green Tree Ant (Oecophylla smaragdina) crushed by Aboriginal to breathe fumes which aid in clearing up nasal congestion, Northern Territory, Australia

Daniel Heuclin / South american river / Arrau turtle (Podocnemis expansa) basking on rock by side of river, River Yapacani, Bolivian Amazona.

Stephen Belcher / Kakapo (Strigops habroptilus) eating from supplementary food feeder which is activated to open by the bird's tracking device, Codfish Island, New Zealand

Stephen Belcher / Kakapo (Strigops habroptilus) having blood taken by researchers, Codfish Island, New Zealand

Rolf Nussbaumer / Black vulture (Coragyps atratus) adult eating a fish by the side of lake, Dinero, Lake Corpus Christi, South Texas, USA.

Pete Oxford / Yellow-spotted Amazon River Turtle (Podocnemis unifilis) sunbathing surrounded by butterflies sipping salts from the turtle's tears, Yasuni National Park, Amazon, Ecuador

Ross Hoddinott / 2020VISION / Common heather (Calluna vulgaris) in flower by the side of a track, with a man walking in the background, Arne RSPB reserve, Dorset, England, UK, September. Model released.

Martin Willis / Pacific Gull (Larus pacificus) pair by the ocean, Cheyne Beach, Western Australia, Australia

Richard Du Toit / Tawny Eagle (Aquila rapax) mobbed by Fork-tailed Drongos (Dicrurus adsimilis), Kgalagadi Transfrontier Park, South Africa

Konrad Wothe / Loggerhead Sea Turtle (Caretta caretta) hatchling held by child, Lykia, Turkey

Hiroya Minakuchi / Gray Whale (Eschrichtius robustus) calf being pet by tourists on whale watching boat, showing baleen plates, San Ignacio Lagoon, Baja California, Mexico

Piotr Naskrecki / Carpenter Ant (Camponotus sp) parasitized and killed by Sac Fungus (Cordyceps sp), Sipaliwini, Surinam

Piotr Naskrecki / Bush Cricket (Uromenus ortegai) female carrying spermatophore produced by male during mating, Guadarrama Mountains, Spain

Piotr Naskrecki / Solom Katydid (Salomona bispinosa) parasitized by horsehair worm, New Britain, Papua New Guinea

Colin Monteath / Caribou (Rangifer tarandus) group running, introduced by whalers in early 1900s, South Georgia Island, Antarctica

ZSSD / Harpy Eagle (Harpia harpyja) displaying by spreading head feathers, native to Central and South America

Petra Wegner / Ogar Polski / Polish Hound, short haired, two sitting side by side.

Brent Stephenson / New Zealand Albatross (Diomedea antipodensis) in flight, showing underwing. Flanked by Cape / Pintado Petrel (Daption capsense australe) on either side. Off Kaikoura, Canterbury, New Zealand, October.

Chien Lee / Plain-pouched Hornbill (Aceros subruficollis) male approaching nest cavity being mobbed by Greater Racket-tailed Drongo (Dicrurus paradiseus), Uthai Thani, Thailand

Martin Willis / Bridled Honeyeater (Lichenostomus frenatus) feeding on Red Mahogany (Eucalyptus resinifera) sap from cut made by Greater Glider (Petauroides volans), Wondecla, Queensland, Australia

Ann & Steve Toon / Common / Eurasian crane chick (Grus grus) being exercised by 'crane mother' in crane costume, Great Crane captive breeding and reintroduction project, Wildfowl and Wetlands Trust, Slimbridge, Gloucest...

Piotr Naskrecki / Treehopper (Harmonides sp) nymphs guarded by Ants (Formicidae), La Selva Biological Research Station, Heredia, Costa Rica

Michael & Patricia Fogden / Hollowheart (Acnistus arborescens) flowers being pollinated by Bees (Apidae) in cloud forest, Tandayapa Valley, western slope of Andes, Ecuador

Andy Rouse / Two Common Zebra (Equus quagga) resting on each other standing side by side. Masai Mara, Kenya.

Christian Ziegler / Green Iguana (Iguana iguana) female from farm held by biologist August Gonzales, Barro Colorado Island, Panama

Kevin Schafer/ AITo / Maleo (Macrocephalon maleo) chick held by researcher after hatching in sand, Sulawesi, Indonesia

Nuno Sa / Whale Shark (Rhincodon typus) accompanied by Pilot Fish (Naucrates ductor). The biggest fish in the world has only started to visit the Azores in the past three years due to water temperature rise. Sa...

Pete Oxford / African Elephant (Loxodonta africana) domesticated orphans feeding on palm fruit by shaking tree, Grey Matters, Moremi Game Reserve, Okavango Delta, Botswana

Graham Eaton / Black Iguana (Ctenosaura similis) lying on rocks by the side of a hotel pool. Cancun, Mexico, February. Editorial Use Only.

Michael Quinton / Black Bear (Ursus americanus) female and cubs fishing for pink salmon surrounded by scavenging gulls, Alaska

Michael Quinton / Black Bear (Ursus americanus) female and cubs fishing for pink salmon surrounded by scavenging gulls, Alaska

Piotr Naskrecki / Ground Agama (Agama aculeata) inflating its body to make itself more difficult to be swallow by a predator, South Africa

Piotr Naskrecki / Tuatara (Sphenodon punctatus) is threatened by invasive species and the habitat loss, New Zealand

Piotr Naskrecki / Tuatara (Sphenodon punctatus) is threatened by invasive species and the habitat loss, New Zealand

Piotr Naskrecki / Discarded gun shell, left by an illegal poacher, Atewa Range, Ghana

Christian Ziegler / King Spider Orchid (Caladenia pectinata) flower swarmed by male parasitic wasps who interpret the flowerÆs red lip as female wasp, western Australia

Christian Ziegler / King Spider Orchid (Caladenia pectinata) flower being visited by male parasitic wasp which is attracted to the flower by faux female wasp pheromone, western Australia

Christian Ziegler / Orchid (Elleanthus sp) flower being pollinated by male Magnificent Hummingbird (Eugenes fulgens), Finca Dracula Orchid Sanctuary, Panama

Christian Ziegler / Orchid (Bulbophyllum corolliferum) flowers being pollinated by flies, Sabah, Borneo, Malaysia

Christian Ziegler / King Spider Orchid (Caladenia pectinata) being visited by male parasitic wasp pollinator which is attracted to the flower by faux female wasp pheromone, Australia

Christian Ziegler / Zebra Orchid (Caladenia cairnsiana) flower being pollinated by male parasitic wasp which is attracted to the flower by faux female wasp pheromone, western Australia

Bryan and Cherry Alexander / The lee side of a large tabular iceberg is almost hidden by the snow blowing off the top of it in windy weather. Antarctica, October 2006.

Bryan and Cherry Alexander / Weather Station by the side of the Blue Ice Runway at Patriot Hills. Antarctica, January 2006.

Christian Ziegler / Ant (Crematogaster sp) group defending Macaranga (Macaranga sp) plant, but are fooled by caterpillar that is using fake ant pheromones, Lambir Hills National Park, Sarawak, Malaysia

Christian Ziegler / Ant (Crematogaster sp) group defending Macaranga (Macaranga sp) plant, but are fooled by caterpillar that is using fake ant pheromones, Lambir Hills National Park, Sarawak, Malaysia

Christian Ziegler / Radio transmitter on the back of a bat used by scientists to record its movements, Smithsonian Tropical Research Station, Barro Colorado Island, Panama

Christian Ziegler / Radio transmitter used by scientists to record bat movements, Smithsonian Tropical Research Station, Barro Colorado Island, Panama

Christian Ziegler / Red Mangrove (Rhizophora mangle) leaves fed on by Skipper (Phocides sp) caterpillars, Carrie Bow Cay, Belize

Richard Du Toit / Cheetah (Acinonyx jubatus) with radio collar walking by alert Springbok (Antidorcas marsupialis) herd, Kalahari, Northern Cape, South Africa

Richard Du Toit / Black Heron (Egretta ardesiaca) fishing by using wings to make an umbrella which casts a shadow over the water, Marievale, South Africa

Pete Oxford / Yellow-spotted / Side Necked River Turtle (Podocnemis unifilis) tracks across sand, left by a female searching for a suitable place to lay eggs. Guarico Province, Venezuela.