Anup Shah / Celebes / Black crested macaque (Macaca nigra) 'Alpha' baby female aged about 1 month hanging upside down in a tree, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male resting on a fallen tree, Tangkoko National Park, Sulawesi, Indonesia.

Ross Hoddinott / Marbled White butterfly (Melanargia galathea) resting on grass, Dunsdon Nature Reserve, Devon, UK. July

Dale Sutton / 2020VISION / Common frog (Rana temporaria) leaping into a pond, controlled conditions, UK.

Mark Carwardine / Grey whale (Eschrichtius robustus) calf upside down, San Ignacio Lagoon, Baja California, Mexico

Fabrice Cahez / Eurasian griffon vulture (Gyps fulvus) in flight, diving downwards, Gorges du Tarn, France, January.

Pete Oxford / Upside down Jellyfish (Cassiopeia sp) Jardines de la Reina National Park, Cuba, Caribbean

Pete Oxford / Caribbean trumpetfish (Aulostomus maculatus) Bonaire, Netherlands Antilles, Caribbean

Alex Hyde / Dead leaf mantis (Deroplatys dessicata) hanging upside down from twig, photographed against a white background, orginating from South East Asia. Captive.

Juan Carlos Munoz / Two White Tailed Sea Eagle (Haliaeetus albicilla) fighting in acrobatic flight as Raven (Corvus corax) looks on. Scandinavia, April. 5th, 2010 Euronatur Wildlife photographer competition.

Jeff Rotman / Child snorkeling and exploring on coral reef wall. Red Sea, Egypt. Model released Model released.

Jan Hamrsky / Mosquito (Culex pipiens) larva below its pupa case. Europe, August.

Pete Oxford / Yellow-headed Amazon Parrot (Amazona oratrix) captive, Belize

Markus Varesvuo / Common Crossbill (Loxia curvirostra) female foraging on a spruce cone. Kuusamo, Finland, February.

Doug Perrine / Reef manta ray (Manta alfredi formerly Manta birostris) barrel roll filter feeding on plankton, Hanifaru Bay, Baa Atoll, Maldives, Indian Ocean, October

Simon Colmer / Blue bottle fly (Calliphora vicina) lying upside down, dead, on white background, Sussex, UK

Juergen Freund / Member of West Papuan dive boat crew free-swimming underwater. North Raja Ampat, West Papua, Indonesia, February 2010

Fiona Rogers / Bornean Orang-utan (Pongo pygmaeus wurmbii) female baby 'Petra' aged 12 months hanging upside down from her mother. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia, Ju...

Suzi Eszterhas / Two Purple / Striped Jellyfish (Pelegia / Chrysaora colorata) Monterey Bay Aquarium, California, USA, Captive

Edwin Giesbers / Four Mallard (Anas platyrhynchos) dabbling for food in icy water. The Netherlands, January.

Alex Hyde / Spiny flower mantis (Pseudocreobotra wahlbergii) shedding skin. Captive, originating from Africa.

Juan Carlos Munoz / Great white shark (Carcharodon carcharias) leaping out of the water. False Bay, South Africa, July 2010

Chien Lee / Spotted-winged Fruit Bat (Balionycteris maculata) roosting, Bukit Sarang Conservation Area, Bintulu, Borneo, Malaysia

Kristel Richard / A Khampa warrior, mounted on his running Tibetan horse, tries to catch white scarves laid out on the ground, during the horse festival, near Huangyan, in the Garze Tibetan Autonomous Prefecture in the...

Nick Upton / Pair of Flesh Flies (Sarcophaga sp.) mating, Wiltshire pastureland, UK, May.

Claudio Contreras / Guadalupe fur seal (Arctocephalus townsendi) pup playing underwater, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, March

Claudio Contreras / Northern elephant seal (Mirounga angustirostris) weaner / juvenile head portrait, with head turned to look at camera, Guadalupe Island Biosphere Reserve, off the coast of Baja California, Mexico, Febr...

Stephen Dalton / Leopard frog {Rana pipiens} diving into water, controlled conditions, from USA

Stephen Dalton / Common frog {Rana temporaria} diving into water, controlled conditions, UK

Chris Gomersall / Red squirrel (Sciurus vulgaris) on tree trunk, in pine forest, Speyside, Scotland, July

Wild Wonders of Europe / della Ferrera / Amanda's blue (Polyommatus amandus) on grass seed, Nuglasica area, Northern part of Livanjsko Polje, Bosnia and Herzegovina, May 2009

Alex Hyde / Peacock Butterfly {Inachis io} emerging from chrysalis against white background. Sequence 5/6.

Alex Hyde / Peacock Butterfly {Inachis io} emerging from chrysalis against white background. Sequence 2/6.

Alex Hyde / Peacock Butterfly {Inachis io} emerging from chrysalis against white background. Sequence 3/6.

Alex Hyde / Peacock Butterfly {Inachis io} emerging from chrysalis against white background. Sequence 1/6.

Jeff Rotman / Bottlenose Dolphin (Tursiops truncatus) feeding in sandy bottom of seabed, Red Sea, Egypt

David Shale / Deepsea Medusa jellyfish (Colobonema sp), Mid-Atlantic Ridge, North Atlantic Ocean

Stephen Dalton / Common frog {Rana temporaria} diving into water from bank, UK, controlled conditions

Mark Bowler / Red howler monkey (Alouatta seniculus) portrait, captive

Wild Wonders of Europe / O. Haarberg / Wooden boats lying upside down on sea shore, Rdlga island, Stockholm Archipelago, Sweden, June 2009

Wild Wonders of Europe / Zacek / Willow tit (Poecile montanus) on small branch, Kitkajoki, Finland, February 2009

Wild Wonders of Europe / Geslin / Grey seal (Halichoerus grypus) rolling over, with sand being blown by wind, Donna Nook, Lincolnshire, UK, November 2008

Kevin Schafer / Amazon River Dolphin (Inia geoffrensis) swimming, Rio Negro, Amazonia, Brazil

Kevin Schafer / Amazon River Dolphin (Inia geoffrensis) swimming, Rio Negro, Amazonia, Brazil

Andy Sands / Green veined white butterfly (Pieris napi) captive, on flower of Greater stitchwort (Stellaria holostea), UK.

Andy Rouse / Galapagos sealion (Zalophus californianus wollebaeki) swimming underwater, upside down, Galapagos

Wild Wonders of Europe / Arndt / Schreiber's long fingered bat (Miniopterus schreibersi) colony roosting, Grotta Monte Majore, Gennargentu NP, Sardinia, Italy, November 2008

Wild Wonders of Europe / Arndt / Lesser Horseshoe Bat (Rhinolophus hipposideros) hibernating in cave amongst stalactites, Grotta Monte Majore, Gennargentu NP, Sardinia, Italy, November 2008 WWE BOOK. WWE INDOOR EXHIBITION

Wild Wonders of Europe / Arndt / Lesser Horseshoe Bat (Rhinolophus hipposideros) hibernating amongst stalactites, Grotta Monte Majore, Gennargentu NP, Sardinia, November 2008

Wild Wonders of Europe / Arndt / Schreiber's long fingered bat (Miniopterus schreibersi) colony roosting, Grotta Monte Majore, Gennargentu NP, Sardinia, Italy, November 2008 WWE OUTDOOR EXHIBITION

Wild Wonders of Europe / Arndt / Lesser Horseshoe Bat (Rhinolophus hipposideros) hibernating amongst stalactites, Grotta Monte Majore, Gennargentu NP, Sardinia, November 2008

Edwin Giesbers / Black and white ruffed lemur (Varecia variegata variegata) hanging from branch, Madagascar, captive

Juergen Freund / Humpback whale (Megaptera novaeangliae) turning underwater, off Tonga

Tony Heald / Malayan colugo (Cynocephalus variegatus) hanging upside-down in tree feeding on algae at night, Danum Valley, Sabah, Borneo, September

Jane Burton / Upside down catfish {Synodontis sp} head portrait showing barbels, captive, from Africa

Mitsuaki Iwago / Giant Panda (Ailuropoda melanoleuca) cub playing in a tree, China

Jouan & Rius / Small Chameleon hanging from a persons arm with one leg, South Madagascar

Pete Oxford / Green-eared chameleons (Calumma malthe) hanging upside down mating, larger male on right, rainforest, MADAGASCAR, endemic

Jane Burton / Basset Hound, sleeping upside down with ears spread

Chris Newbert / Papuan Jellyfish (Mastigias papua) 20 feet deep, Solomon Islands

Pete Oxford / Australian Walking Stick (Extatosoma tiaratum) harmless, Australia

Jane Burton / Domestic cat, kitten looking down from branch (digitally enhanced composite)

Doug Perrine / Juvenile Sperm whale {Physeter macrocephalus} swimming upside down, Atlantic

Anup Shah / Orang utan baby hanging upside down from branch, (Pongo abelii) Gunung Leuser NP, Indonesia

Konrad Wothe / Orangutan (Pongo pygmaeus) bathing in river while hanging upside-down from vine, Gunung Leuser National Park, Sumatra, Indonesia

Chris Newbert / Papuan Jellyfish (Mastigias papua) 20 feet deep, Solomon Islands

Konrad Wothe / Orangutan (Pongo pygmaeus) drinking from river while hanging upside-down from vine, Gunung Leuser National Park, Sumatra, Indonesia

Doug Perrine / Wild sociable Bottlenose dolphin leaps in boat wake {Tursiops truncatus} Turks & (Non-ex).

Anup Shah / Patas monkey {Erythrocebus patas} upending kidnapped baby. Laikipia plateau, Kenya.

Anup Shah / Playful Vervet monkey in tree (Chlorocebus / Cercopithecus aethiops) Samburu NR, Kenya

Pete Oxford / Day gecko drinking, Ankarana NP, Madagascar

Anup Shah / Young Chimpanzee hanging upside down in tree {Pan troglodytes schweinfurtheii} Gombe NP, Tanzania. 2002

TJ Rich / Leopard {Panthera pardus} resting

Anup Shah / Flying fox with baby {Pteropus genus} hanging upside down from branch. Occurs in Malaysia

Nick Upton / Male Dark bush cricket (Pholidoptera griseoaptera) clinging upside down to a dead grass stem, chalk grassland meadow, Wiltshire, August, UK.

Ernie Janes / Shoveler (Anas clypeata) drakes upended feeding together, Norfolk, October

Ernie Janes / Shoveler (Anas clypeata) drakes upended feeding together, Norfolk, October

Anup Shah / Celebes / Black crested macaque (Macaca nigra) juvenile hanging from a branch, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) juvenile resting against a tree trunk, Tangkoko National Park, Sulawesi, Indonesia.

Suzi Eszterhas / Hoffmann's Two-toed Sloth (Choloepus hoffmanni) orphan baby feeding on leaves in Aviarios Sloth Sanctuary, Costa Rica

Suzi Eszterhas / Hoffmann's Two-toed sloths (Choloepus hoffmanni) two orphan babies in Aviarios Sloth Sanctuary, Costa Rica

Winfried Wisniewski / Eland (Taurotragus oryx) sub-adult male with Yellow-billed Oxpeckers (Buphagus africanus), Masai Mara, Kenya

Ben Lascelles / Northern Tamandua (Tamandua mexicana opistholeuca) climbing tree, Soberania National Park, Panama, April

Staffan Widstrand / Walrus (Odobenus rosmarus) resting upside down, Svalbard, Norway

Juergen Freund / Spectacled flying fox (Pteropus conspicillatus) babies hanging in their nursery at Tolga Bat Hospital, North Queensland, Australia, November 2012

Juergen Freund / Spectacled flying fox (Pteropus conspicillatus) baby or bub is cared for by Ashleigh Johnson, volunteer wildlife carer at Tolga Bat Hospital, North Queensland, Australia October 2012

Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) young playing, Montana

Alex Hyde / Marbled White (Melanargia galathea) on grass, Gran Paradiso National Park, Aosta Valley, Pennine Alps, Italy. July.

Alex Hyde / Marbled White (Melanargia galathea), Gran Paradiso National Park, Aosta Valley, Pennine Alps, Italy. July.

Markus Varesvuo / Common Treecreeper (Certhia familiaris) searching for insect prey under bark on branch, Uto Finland November

Chien Lee / Spotted-winged Fruit Bat (Balionycteris maculata), Bintulu, Bukit Sarang Conservation Area, Sarawak, Borneo, Malaysia

Chien Lee / Lesser Short-nosed Fruit Bat (Cynopterus brachyotis) spreading wings, Bukit Sarang Conservation Area, Bintulu, Borneo, Malaysia

Ingo Arndt / Leafcutter Ant (Atta sp) group carrying sections of leaves, to be used for cultivating nutritious fungi, Costa Rica

Ingo Arndt / Mosquito (Aedes sp) on branch covered with dew, Germany