Chien Lee / Spectral Tarsier (Tarsius tarsier), Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Lilac-cheeked Kingfisher (Cittura cyanotis), Tangkoko Nature Reserve, Sulawesi, Indonesia

Michael & Patricia Fogden / Green-spotted Swallowtail (Graphium tynderaeus) butterfly, Tangkoko Batuangus Reserve, Indonesia

Tui De Roy / Sulawesi Red-knobbed Hornbill (Aceros cassidix) male delivering figs to a female sealed inside hollow nest cavity, Tangkoko Dua Saudara Nature Reserve, Sulawesi, Indonesia

Chien Lee / Celebes Black Macaque (Macaca nigra) pair grooming, Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Long Horn Beetle (Batocera sp), Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Hooded Pitta (Pitta sordida), Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Hooded Pitta (Pitta sordida), Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Spectral Tarsier (Tarsius tarsier), Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Bear Cuscus (Ailurops ursinus) in tree, Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Green-backed Kingfisher (Actenoides monachus), Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Celebes Black Macaque (Macaca nigra), Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Spectral Tarsier (Tarsius tarsier) climbing tree at night, Tangkoko Nature Reserve, Sulawesi, Indonesia

Chien Lee / Lilac-cheeked Kingfisher (Cittura cyanotis), Tangkoko Nature Reserve, Sulawesi, Indonesia

Thomas Marent / Sea Putat (Barringtonia asiatica) flowers on volcanic black sand beach at sunrise, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Forester Moth (Zygaenidae), Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Pierid Butterfly (Appias hombroni) feeding on minerals in soil, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Fungus (Mycena sp) group glowing at night, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Fungus (Mycena sp) glowing at night, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Arum (Amorphophallus sp) flowering on forest floor, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Weeping Fig (Ficus benjamina) showing strangling air roots, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Arum (Amorphophallus sp) flowering on forest floor, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Arum (Amorphophallus sp) flowering on forest floor, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Weeping Fig (Ficus benjamina) and Woka Palm (Livistona rotundifolia), Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Woka Palm (Livistona rotundifolia) fronds, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Woka Palm (Livistona rotundifolia) frond, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / True Fig Shell (Ficus variegata) buttress roots, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / True Fig Shell (Ficus variegata) with buttress roots, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Spectral Tarsier (Tarsius tarsier), Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Spectral Tarsier (Tarsius tarsier), Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Spectral Tarsier (Tarsius tarsier), Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) filmed by tourist, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) male sitting on forest floor, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) male sitting on forest floor, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) juvenile climbing on buttress roots, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra), Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) in rainforest interior, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) mother with baby, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) juvenile feeding on fruit, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) group beside a Corpse Flower (Amorphophallus paeoniifolius), Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) feeding beside a Corpse Flower (Amorphophallus paeoniifolius), Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) females grooming, on with a baby, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) in rainforest interior, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) male displaying, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra), Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) portrait, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) pair grooming, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) female with baby, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) females with young, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) mothers grooming young, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) male, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Michael & Patricia Fogden / Giant Strangler Fig (Ficus aurea) base of trunk, Tangkoko Batuangus Reserve, Indonesia

Michael & Patricia Fogden / Giant Strangler Fig (Ficus aurea) base of trunk, Tangkoko Batuangus Reserve, Indonesia

Michael & Patricia Fogden / Weeping Fig (Ficus benjamina) hollow interior after death of host plant, Tangkoko Batuangus Reserve, Indonesia

Michael & Patricia Fogden / Woka Palm (Livistona rotundifolia) buttress roots of tree and understory palms, Tangkoko Batuangus Reserve, Indonesia

Michael & Patricia Fogden / Fig (Ficus sp) buttress roots, Tangkoko Batuangus Reserve, Indonesia

Michael & Patricia Fogden / Giant Strangler Fig (Ficus aurea) and Woka Palms (Livistona rotundifolia), Tangkoko Batuangus Reserve, Indonesia

Michael & Patricia Fogden / Helena Birdwing (Troides helena) butterfly, Tangkoko Batuangus Reserve, Sulawesi, Indonesia

Thomas Marent / Sea Putat (Barringtonia asiatica) flowers on volcanic black sand beach, Tangkoko Nature Reserve, Sulawesi, Indonesia

Thomas Marent / Spectral Tarsier (Tarsius tarsier), Tangkoko Nature Reserve, Sulawesi, Indonesia

Thomas Marent / Spectral Tarsier (Tarsius tarsier) juvenile, Tangkoko Nature Reserve, Sulawesi, Indonesia

Mark Moffett / Ant (Acanthomyrmex sp) pair showing difference in size and morphology, Tangkoko Nature Reserve, Indonesia

Mark Moffett / Ant (Acanthomyrmex sp) pair showing differences in size and morphology, Tangkoko Nature Reserve, Indonesia

Thomas Marent / Spectral Tarsier (Tarsius tarsier) juvenile, Tangkoko Nature Reserve, Sulawesi, Indonesia

Thomas Marent / Sulawesi Red-knobbed Hornbill (Aceros cassidix) male bringing food to female at nest, Tangkoko Nature Reserve, Sulawesi, Indonesia

Thomas Marent / Two caterpillars on hanging liana, Tangkoko Nature Reserve, Sulawesi

Thomas Marent / Celebes Black Macaque (Macaca nigra) drinking water that has collected in tree trunk, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) feeding on fruit, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Thomas Marent / Celebes Black Macaque (Macaca nigra) grooming and mother with baby, Tangkoko Nature Reserve, northern Sulawesi, Indonesia

Petra Wegner / Siberian Husky, puppy, 11 weeks, lying down.

Chadden Hunter / Husky dog (Canis familiaris) Northern Canada, taken on location for BBC Frozen Planet series, 2009

Chadden Hunter / Close up of Husky dog eyes (Canis familiaris), note the different eye colour, Northern Canada. Taken on location for BBC Frozen Planet series, 2009

Uri Golman / Portrait of photographer Uri Golman with Greenland husky sled dog, North East Greenland. March 2009. Model released

Jane Burton / Back view of two sitting Siberian Husky pups, 6 weeks old, looking to one side

Mark Raycroft / Alaskan Malamute (Canis familiaris) in snow wearing pack

Mark Raycroft / Alaskan Malamute (Canis familiaris) adult laying in grass

Mark Raycroft / Alaskan Malamute (Canis familiaris) portrait sitting

Mark Raycroft / Alaskan Malamute (Canis familiaris) adult, portrait in snow

Mark Raycroft / Alaskan Malamute (Canis familiaris) puppies laying on sled

Staffan Widstrand / Dogs pulling tourist sledge Spitzbergen, Svalbard, Norway

Mark Raycroft / Siberian Husky (Canis familiaris)

Mark Raycroft / Siberian Husky (Canis familiaris)

Mark Raycroft / Siberian Husky (Canis familiaris)

Petra Wegner / Siberian Husky, puppy, 11 weeks, standing.

Petra Wegner / Siberian Husky, puppy, 11 weeks, standing.

Petra Wegner / Siberian Husky, puppy, 11 weeks, head profile.

Petra Wegner / Siberian Husky, puppy, 11 weeks, lying down with head tilted to one side.

Petra Wegner / Siberian Husky, puppy, 11 weeks, lying down.

Petra Wegner / Siberian Husky, puppy, 11 weeks, head portrait.

Petra Wegner / Siberian Husky, puppy, 11 weeks, sitting portrait.

Petra Wegner / Siberian Husky, puppy, 11 weeks, head portrait.

Petra Wegner / Siberian Husky, puppy, 11 weeks, sitting portrait.

Petra Wegner / Siberian Husky, puppy, 11 weeks, sitting portrait.

Petra Wegner / Siberian Husky, puppy, 11 weeks, sitting portrait.

Chadden Hunter / Husky dogs (Canis familiaris) linked to sledge, Northern Canada. Taken on location for BBC Frozen Planet series, 2009

Mark Raycroft / Siberian Husky (Canis familiaris) male and female

Mark Raycroft / Siberian Husky (Canis familiaris) pair in snow

Doug Allan / Inuit husky dog team crossing crack in sea ice. Near Qaanaaq, Greenland. Freeze frame book plate page 161.

Bryan and Cherry Alexander / Husky covered in snow during a winter storm on Baffin Island, Nunavut, Canada.

Bryan and Cherry Alexander / Inuit hunter and his wife travelling by dog sled on a seal hunting trip across sea ice near Igloolik. Nunavut, Canada, April 2008.

Bryan and Cherry Alexander / Inuit youth driving dogs on the ice while his parents ride the snowmobile behind. Igloolik, Nunavut, Canada, April 2008.

Eric Baccega / Tethered Husky dogs for pulling sledge, Greenland

Mark Raycroft / Siberian Husky (Canis familiaris) adult and puppy

Mark Raycroft / Siberian Husky (Canis familiaris)

Mark Raycroft / Siberian Husky (Canis familiaris) puppy running in snow

Mark Raycroft / Siberian Husky (Canis familiaris) puppies running in snow

Mark Raycroft / Siberian Husky (Canis familiaris) in snow

Mark Raycroft / Siberian Husky (Canis familiaris)

Mark Raycroft / Siberian Husky (Canis familiaris) in snow

Mark Raycroft / Siberian Husky (Canis familiaris) sled dog

Mark Raycroft / Siberian Husky (Canis familiaris) group tied to sled

Mark Raycroft / Siberian Husky (Canis familiaris)

Mark Raycroft / Siberian Husky (Canis familiaris) in snow

Mark Raycroft / Siberian Husky (Canis familiaris)

Bryan and Cherry Alexander / Husky (Canis familiaris) puppy in the snow, Northwest Greenland.

Eric Baccega / Young domestic dog (Canis familiaris) chewing on drying Caribou (Rangifer tarandus) skin in back yard. Resolute village, Cornwallis Island, Nunavut, Canada, August 2010

Bryan and Cherry Alexander / Tethered Husky (Canis familiaris) bitch feeding her pups. Northwest Greenland.

Bryan and Cherry Alexander / Inuit hunter adjusting harness on Husky (Canis familiaris). Northwest Greenland, 1980.

Bryan and Cherry Alexander / Polar bear (Ursus maritimus) caught in lead, watched by Husky (Canis familiaris). Northwest Greenland.

Bryan and Cherry Alexander / Husky (Canis familiaris) watching Polar bear (Ursus maritimus) caught in lead in the ice. Northwest Greenland.

Bryan and Cherry Alexander / Inuit hunters travelling by dog sled pulled by Husky dogs (Canis familiaris) on seal hunt in spring. Northwest Greenland, 1977.

Bryan and Cherry Alexander / Young Inuit girl from Siorapluk holding Husky dog (Canis familiaris) puppy, Northwest Greenland, 1989.

Bryan and Cherry Alexander / Lone Husky dog (Canis familiaris) howling. Savissivik, Northwest Greenland.

Bryan and Cherry Alexander / Inuit child with whip and Husky (Canis familiaris) puppy. Qeqertat, Northwest Greenland, 1980.

Bryan and Cherry Alexander / Sleeping Husky (Canis familiaris) and pup. Northwest Greenland.

LYNN M. STONE / Siberian Husky, portrait of female, sitting in snow by evergreen bush, St. Charles, Illinois, USA

LYNN M. STONE / Siberian Husky, portrait of female, sitting in snow by evergreen bush, St. Charles, Illinois, USA

LYNN M. STONE / Siberian Husky, portrait of female, sitting in snow by evergreen bush, St. Charles, Illinois, USA

LYNN M. STONE / Siberian Husky, head portrait of male aged 2 years, in mid-winter near woodland, St. Charles, Illinois, USA.

LYNN M. STONE / Siberian Husky, portrait of male aged 2 years, in mid-winter, sitting in snow on bank along stream, St. Charles, Illinois, USA

LYNN M. STONE / Siberian Husky, head portrait of male aged 2 years, in mid-winter near woodland, St. Charles, Illinois, USA.

Aflo / ic-04201 Siberian husky head portrait.

Aflo / ic-03508 Siberian husky dog head profile portrait.

Aflo / ic-05410 Two Siberian husky puppies sleeping.

Aflo / ic-04906 Siberian husky sitting portrait.

Aflo / ic-04504 Girl taking dog for walk on lead.

Uri Golman / Modern hunter's cabin at the edge of the pack ice and sledge / Husky dogs, Scoresbysund, North East Greenland. March 2009.

Uri Golman / Greenland Husky, Ittoqqortoormiit, Scoresbysund, North East Greenland. March 2009.

Uri Golman / Dog team of Greenland Husky in deep snow near Scoresbysund, Ittoqqortoormiit, North East Greenland. March 2009.

Uri Golman / Dog team of Greenland Husky in deep snow near Scoresbysund, Ittoqqortoormiit, North East Greenland. March 2009.

Patricio Robles Gil / Kamchatka siberian husky sitting, used to keep bears away from cabin, remote part of Kamchatka, Russia

Juan Carlos Munoz / Team of dogs pulling sledge over snow, Dovrefjell National Park, Norway, April 2009

Juan Carlos Munoz / Team of dogs pulling sledge over snow, Dovrefjell National Park, Norway, April 2009

Juan Carlos Munoz / Team of dogs pulling sledge over snow, Dovrefjell National Park, Norway, April 2009

Niall Benvie / Husky (Canis familiaris), Estonia.

Niall Benvie / Husky (Canis familiaris) howling, Estonia.

Colin Monteath / Siberian Husky (Canis familiaris) waking up covered with snow, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) waking up covered with snow, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) running in sled team with Mike McDowell skiing alongside, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) group running in sled team with Tore Stenseng skiing alongside, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) group resting in harnesses, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) running in sled team with Mike McDowell skiing alongside, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) group running in sled team with Sjur Mordre skiing alongside, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) groups pulling sleds westward over icedome, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) groups pulling sleds westward over icedome, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) group resting after mushing, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) group resting in polar midnight light, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) resting in polar midnight light, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) group running in sled team in polar midnight light, Greenland

Colin Monteath / Siberian Husky (Canis familiaris) group running in sled team with Tore Stenseng skiing alongside, Greenland

Mark Raycroft / Siberian Husky (Canis familiaris) puppy running in snow

Jane Burton / Siberian Husky interacting with puppy

Colin Seddon / Husky bitch with puppy, in cage, UK

Colin Seddon / Husky dog, 6-week puppy, UK

Eric Baccega / Siberian husky sled dogs (Canis familiaris) pair in snow, Northwest Territories, Canada March 2007