Konrad Wothe / Sheep Tick (Ixodes ricinus) engorged with blood on skin, Bavaria, Germany

Adrian Davies / Castor oil plant (Ricinus communis) in flower, UK, October

Adrian Davies / Castor oil plant (Ricinus communis) in flower, UK, October

Daniel Heuclin / Sheep Tick (Ixodes ricinus) embedded in skin. Vector for Lyme disease and tick-borne meningoencephalitis. Poitou, France, October.

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

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

Kerstin Hinze / Sheep tick (Ixodes ricinus) Grotta su Coloru, Sardinia, Italy

Jose B. Ruiz / Castor oil plant (Ricinus communis) growing amongst rubble, Riotinto, Huelva, Spain

Kim Taylor / Sheep Tick (Ixodes ricinus), second stage larva in fur on head of Wood / Long-tailed Field Mouse (Apodemus sylvaticus) captive, UK

Kim Taylor / Sheep Tick (Ixodes ricinus), second stage larva in fur on head of Wood / Long-tailed Field Mouse (Apodemus sylvaticus) captive, UK

PREMAPHOTOS / Sheep tick (Ixodes ricinus) fully engorged female on a cat, UK

Michael Durham / Sheep Tick (Ixodes ricinus) female engorged after a blood meal, northeast Oregon

Michael Durham / Sheep Tick (Ixodes ricinus) male in northeast Oregon

Michael Durham / Sheep Tick (Ixodes ricinus) male in northeast Oregon

Ingo Arndt / Sheep Tick (Ixodes ricinus) or Pasture Tick on leaf, Europe

Jane Burton / Sheep tick {Ixodes ricinus} attached to a domestic dog, UK.

Jane Burton / Sheep tick {Ixodes ricinus} attached to a domestic dog, UK.

Kim Taylor / Engorged sheep tick {Ixodes ricinus}, UK.

Kim Taylor / Sheep tick {Ixodes ricinus} female dies after laying a clutch of eggs, UK.

Kim Taylor / Sheep tick, moribund female with eggs {Ixodes ricinus} UK.

Kim Taylor / Sheep tick, female engorged with blood after feeding {Ixodes ricinus} UK.

Kim Taylor / Sheep tick, moribund female with eggs {Ixodes ricinus} UK.

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

Adrian Davies / Engorged Sheep tick on bracken {Ixodes ricinus} England

Kim Taylor / Sheep tick {Ixodes ricinus} on the forehead of a Border Collie, UK.

Kim Taylor / Sheep tick {Ixodes ricinus} attached to skin of a domestic dog. UK.

Kim Taylor / Engorged Sheep Tick (Ixodes ricinus) UK

Jose B. Ruiz / Fruit of Castor oil plant (Ricinus communis). Alicante, Spain, Europe

Jose B. Ruiz / Fruit of Castor oil plant {Ricinus communis} Alicante Spain

Jose B. Ruiz / Fruit of Castor oil plant {Ricinus communis} Alicante Spain

Jose B. Ruiz / Leaves of Castor oil plant (Ricinus communis). Alicante, Spain, Europe

Jose B. Ruiz / Leaves of Castor oil plant

Konrad Wothe / Sheep Tick (Exudes ricinus) juvenile, Germany

Jose B. Ruiz / Castor oil plant {Ricinus communis} Spain

Jose B. Ruiz / Castor oil plant {Ricinus communis} Spain