Ticks

Ticks are external parasites, living by hematophagy on the blood of mammals, birds, and sometimes reptiles and amphibians.  

Ticks

Ticks are small arachnids in the order Parasitiformes. Along with mites, they constitute the subclass Acarina. Ticks are external parasites, living by hematophagy on the blood of mammals, birds, and sometimes reptiles and amphibians. 

Ticks are vectors of a number of diseases, including Lyme disease, Q fever (rare; more commonly transmitted by infected excreta), Colorado tick fever, Rocky Mountain spotted fever, African tick bite fever, tularemia, tick-borne relapsing fever, babesiosis, ehrlichiosis, Tick paralysis, and tick-borne meningoencephalitis, as well as bovine anaplasmosis and probably the Heartland virus.