Owen Newman / Jo / Hoan bushman baby sucking his thumb, Bushmanland, Namibia. 1996

Luiz Claudio Marigo / Spectacled caiman {Caiman crocodilus} with Butterfly {Dryadula phaetusa} sucking

John Downer / Raining fish - a reconstruction for BBC TV series 'Supernatural' (1999). It is thought that naturally occuring events are caused by fish being lifted by rotating winds, such as tornadoes, dust devils...

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 animal {Glossina morsitans} captive, from Africa

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

Kim Taylor / Sheep tick {Ixodes ricinus} sucking blood from dog. UK.

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

Kim Taylor / Stable Fly (Stomoxys calcitrans) showing blood- sucking proboscis. UK.

Kim Taylor / Tsetse Fly (Glossina morsitans) sucking blood from human arm. Captive.

Kim Taylor / Mosquito (Culiseta / Theobaldia annulata) sucking blood from human arm. UK

PREMAPHOTOS / Shieldbug sucking sap from plant stem {Peromatus sp} tropical rainforest, Brazil

Elliott Bignell / Mosquito (Toxorhynchitines) sucking human blood. Biting

Juergen Freund / Mosquito (Toxorhynchitines) sucking human blood Biting.

Asgeir Helgestad / Mosquito sucking blood from person. Norway

Jabruson / Assassin bug sucking juices from body of victim (Reduviidae) Odzala NP, Democratic Republic of Congo

Doug Wechsler / Deer tick biting human flesh {Ixodes scapularis} Pennsylvania, USA

Norbert Wu / Limpet (Diodora aspera) escapes sucking arms of Starfish (Pisaster giganteus) by exuding slippery mantle, Monterey, California, sequence 3 of 3

Norbert Wu / Limpet (Diodora aspera) escapes sucking arms of Starfish (Pisaster giganteus) by exuding slippery mantle, Monterey, California, sequence 2 of 3

Norbert Wu / Limpet (Diodora aspera) escapes sucking arms of Starfish (Pisaster giganteus) by exuding slippery mantle, Monterey, California, sequence 1 of 3

Elio Della Ferrera / Child sucking reed stem {Juncus sp} to quench thirst. Dinsho village, Bale Mountains NP, Ethiopia

Christian Ziegler / Ponerine Ant (Ectatomma sp) tending sap-sucking treehoppers in exchange for honeydew, Barro Colorado Island, Panama

Nick Upton / Hood island mocking birds {Nesomimus trifasciatus macdonaldi} sucking blood from Nazca booby (Sula granti) chick, Galapagos

Premaphotos / Deer fly (Chrysops fulvaster) female taking blood from a man's arm, Utah, USA

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

Richard Du Toit / African Elephant (Loxodonta africana) sucking mothers tusk, Chobe River, Botswana

Gerry Ellis / African Elephant (Loxodonta africana) orphan called Natumi, 9 month old sucking keeper's finger, David Sheldrick Wildlife Trust, Tsavo East National Park, Kenya

John Cancalosi / Common brush tailed possum in pouch (Trichosurus vulpecula) Sucking attached to nipple. captive, Brush-tailed possums carry babies in their womb for just 17 days. When they are born the blind, embryon...

Flip Nicklin / Bearded Seal (Erignathus barbatus) pup sucks on researcher's finger for comfort, Norway