Ticks are members of the arachnid group. They are ectoparasites (external parasites), living by hematophagy on the blood of mammals, birds, and occasionally reptiles and amphibians. Ticks are important vectors of a number of diseases, including Lyme disease and Tick-borne meningoencephalitis.

Ticks are found mainly in outdoor areas with woods, shrubs, weeds, and tall grasses. They are particularly found in humid environments. The only ticks generally found to live indoors is the Brown Dog Tick.  Other ticks may enter the home via a pet or person who has been outside in tick-friendly areas.