MYN / Andrew Snyder / Hard tick (Amblyomma sp.) Kanuku Mountains, Guyana. Meetyourneighbours.net project

Joel Sartore / Photo Ark / Tracking shot of an American dog tick (Dermacentor variabilis) female, Lincoln, Nebraska, USA. Controlled conditions.

Jussi Murtosaari / White-tailed deer (Odocoileus virginianus) male, head portrait, ears covered in Castor bean ticks (Ixodes ricinus), Finland. August.

Alex Hyde / Sheep tick (Ixodes ricinus) mouthparts after being extracted from a dog, UK. False-coloured scanning electon micrograph.

Roman Willi / Tick (Ixodes sp.) on human skin, feeding on blood, Lucerne, Switzerland. Focus stacked.

Roman Willi / Tick (Ixodes sp.) portrait, Lucerne, Switzerland. October.

Doug Wechsler / American dog tick (Dermacentor variabilis), vector for Tularemia and Rocky Mountain Spotted Fever, on wood, Montgomery County, Pennsylvania, USA. June.

Bruce Thomson / Paralysis tick (Ixodes holocyclus) female on human skin, feeds on mammals, birds and reptiles, highly dangerous to humans, can lead to paralysis and death if not removed, Bunya Pine Mountains National...

Bruce Thomson / Paralysis tick (Ixodes holocyclus) female on human skin, feeds on mammals, birds and reptiles, highly dangerous to humans, can lead to paralysis and death if not removed, Buyna Pine Mountains National...

Alex Hyde / Sheep / Deer Tick (Ixodes ricinus) feeding on human host causing localised swelling. Scotland, UK. June. This species can be a vector for both Lyme disease and tick-borne encephalitis.

Alex Hyde / Sheep Tick (Ixodes ricinus) photographed on a white background in mobile field studio. Devon, UK. May.

Alex Hyde / Tick (Ixodidae) waing for passing host on leaf in rainforest understory vegetation. Danum Valley, Sabah, Borneo.