Daniel Heuclin / Vinchuca (Triatoma infestans) walking across human skin. The bug is a blood feeder, and vector of Chagas disease. Controlled conditions. Bolivia, April.

Daniel Heuclin / Mosquito (Anopheles gambiae) feeding on human in controlled conditions. The body is becoming engorged with blood. Malaria vector. Africa, June. Engorging sequence 2 of 3. Model released

Alex Hyde / Cleg fly / Horsefly (Haematopota pluvialis) sucking blood from human.

Stephen Dalton / Mosquito (Culicidae) female feeding on human blood, controlled conditions

Nick Upton / Cleg fly / Horsefly (Haematopa pluvialis) sucking blood from photographer's arm, Wiltshire pastureland, UK, June.

Stephen Dalton / Horsefly (Tabanus sudeticus) feeding on human skin, UK

Kim Taylor / Mosquito (Aedes punctor) female sucking blood from human arm. Sequence 3/4

Kim Taylor / Mosquito (Aedes punctor) female sucking blood from human arm. Sequence 1/4

Martin Dohrn / Mosquito gorged with human blood {Culex pipiens} UK

Warwick Sloss / Mosquito {Anopheles gambiae} female sucking blood from human

Roland Seitre / Swelling on human skin, the result of being stung by European Hornet (Vespa crabro). Tours, France, August.

Piotr Naskrecki / Sand Fly (Lutzomyia sp) feeding on human blood, these flies are vectors of many serious tropical diseases, Guyana. Sequence 3 of 3

Piotr Naskrecki / Sand Fly (Lutzomyia sp) feeding on human blood, these flies are vectors of many serious tropical diseases, Guyana. Sequence 2 of 3

Piotr Naskrecki / Sand Fly (Lutzomyia sp) feeding on human blood, these flies are vectors of many serious tropical diseases, Guyana. Sequence 1 of 3

Ernie Janes / Gadfly (Tabanus bromius) biting flesh on human, UK

Tim Laman / Borneo tiger leech (Haemadipsa picta) feeding on human skin, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia

Stephen Dalton / Bedbug (Cimex lectularius) feeding on human skin, UK

Nick Upton / Sequence 1 / 4. Cleg fly / Horsefly (Haematopa pluvialis) about to pierce human skin a second time with blade like mouthparts. Wiltshire pastureland, UK, June.

Stephen Dalton / Yellow fever mosquito (Aedes sp) taking blood from human, Note drop of clear liquid being exuded, from the east coast of South Africa

Adrian Davies / Lyme Disease rash on human skin, serious bacterial disease indicated by outwardly expanding rash (erythema migrans) on human leg caused by bacteria carried by Sheep Tick (Ixodes ricinus) UK

Stephen Dalton / Mosquito {Aedes sp} landing on human skin

Stephen Dalton / Mosquito feeding on human blood

Mark Bowler / Human botfly larvae (Dermatobia hominis) recently removed from a person's skin, Amazon Rainforest, Loreto, Peru

Mark Bowler / Human botfly larvae (Dermatobia hominis) recently removed from a person's skin, on fingernail, Amazon Rainforest, Loreto, Peru

Suzi Eszterhas / Poacher's camp with hides, meat, and skulls of wildebeest and impala found and confiscated by Mara Conservancy rangers, Serengeti National Park, Tanzania

Solvin Zankl / Using pincers to remove European sheep tick (Ixodes ricinus) from human skin, Germany

Solvin Zankl / Using pincers to remove European sheep tick (Ixodes ricinus) from human skin, Germany

Solvin Zankl / Using pincers to remove European sheep tick (Ixodes ricinus) from human skin, Germany

Solvin Zankl / Using pincers to remove European sheep tick (Ixodes ricinus) from human skin, Germany

Solvin Zankl / European sheep tick (Ixodes ricinus) burrowing into human skin, Germany

Pete Oxford / Jaguar (Panthera onca) female receiving microchip under skin from researcher, Ecuador

Shattil & Rozinski / Wood tick {Dermacentor variabilis} on human skin, North Dakota, USA

SINCLAIR STAMMERS / Mosquito {Anopheles stephensi} gorged with human blood

SINCLAIR STAMMERS / Mosquito {Anopheles stephensi} sucking human blood

SINCLAIR STAMMERS / Mosquito {Anopheles stephensi} sucking human blood

PREMAPHOTOS / Notch-horned cleg fly / female horse fly (Haematopota pluvialis) taking a meal of human blood, UK

Warwick Sloss / Mosquito {Anopheles gambiae} female sucking blood from human

Duncan Mcewan / Cleg fly (Haematopota pluvialis) on human skin, Scotland, UK

Nature Production / Mosquito {Culex pipiens molestus} sucking blood from human, Asia

Piotr Naskrecki / Green-eyed Fly (Scione sp) on human skin showing compound eyes, Guyana

John Downer / Bedbug (Cimex lectularius) on human flesh

Kim Taylor / Mosquito (Aedes punctor) female sucking blood from human arm. Sequence 2/4

Jabruson / Male Western lowland gorilla (Gorilla gorilla gorilla) feeding in bai, facial scars as result of human disease picked up by wild gorillas, Odzala NP, Democratic Republic of Congo, Central Africa

Gary Smith / Cleg fly {Haematopota pluvialis} on human skin with drop of blood, UK

Kim Taylor / Tsetse fly sucking blood from human {Glossina morsitans} captive, from Africa

Kim Taylor / Tsetse flies sucking blood from human {Glossina morsitans} captive, from Africa

Kim Taylor / Tsetse fly sucking blood from human {Glossina morsitans} captive, from Africa

Mark Taylor / Brown Leech on human skin after sucking blood. Borneo.

John Downer / Bed bug on human skin

Pete Oxford / Chagra cowboy cutting bull hide to make ropes, lassos and bridles, at a hacienda in the Andes Mountains during the annual cattle round-up, Ecuador

Pete Oxford / Chagra cowboy cutting bull hide to make ropes, lassos and bridles, at a hacienda in the Andes Mountains during the annual cattle round-up, Ecuador

Colin Monteath / Snow Leopard (Uncia uncia) pelts sold in market with police and shopkeeper in stall, Kashgar, Xinjiang, China

Colin Monteath / Snow Leopard (Uncia uncia) and fox fur hat inspected by tourist, Ulan Baatar, Mongolia

Flip Nicklin / Bowhead Whale (Balaena mysticetus) being flensed by Inuits in background while others load muktuk, the skin and outermost layer of skin, onto sleds, Barrow, Alaska

Flip Nicklin / Bowhead Whale (Balaena mysticetus) being flensed by Inuits in the background with muktuk, the skin and outermost layer of skin, displayed on snow, Barrow, Alaska

Mitsuhiko Imamori / Asian Bush Mosquito (Aedes japonicus) feeding on human, Shiga, Japan

Mitsuhiko Imamori / Asian Bush Mosquito (Aedes japonicus) feeding on human, Shiga, Japan

Mitsuhiko Imamori / Asian Tiger Mosquito (Aedes albopictus) feeding on human, Shiga, Japan

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) researchers Lea Gerber and Dr James Darling shoot biopsy darts at whales with dart bouncing off whale unnoticed, carrying a sample of fat and skin in the tip, A...

Doug Wechsler / Tiger leech on human skin {Hirudinea} Sarawak, Lanjah, Malaysia

Niall Benvie / Natterjack toad in human footprint on sand {Bufo calamita} Holland. C

Premaphotos / Banded mosquito (Culiseta annulata) female feeding on human blood, UK

Nature Production / Mosquito {Culex pipiens molestus} sucking human blood, Japan, october

Flip de Nooyer / Photographer walking on mud-flats with hide, Wadden Sea, Netherlands

Gerry Ellis / African Elephant (Loxodonta africana) keeper shading baby orphan Laibon with umbrella to protect skin, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

Pete Oxford / Detail of a cowboy or chagra sitting on his horse showing his chaps made of Jaguar fur, boots and stirrup at Hacienda Yanahurco in the Andes Mountains during the annual cattle round-up, Ecuador