Illinois Natural History Survey - University of Illinois

Kingdom - Animalia

Phylum - Arthropoda

Class - Arachnida

Order - Ixodida

Families - Ixodidae (hard ticks), Agarasidae (soft ticks) and Nuttallielidae (one species in southern Africa)

There are approximately 900 species of ticks worldwide, with 20 species occuring in Illinois.

The 4 species that people in Illinois are likely to encounter are the American Dog tick, Black-legged tick, Lone Star tick, and Brown Dog tick.

 

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American Dog Ticks, (Dermacentor variabilis) are the most commonly encountered in Illinois.  Adults are active from April to September and can carry the pathogens for Rocky Mountain Spotted Fever and Tularemia.

 

 

 

blackleggedtick.jpg

 

The Black-legged Tick (Ixodes scapularis) is present year round and can carry the pathogens for Lyme disease, Babesiosis, and Anaplasmosis.  All life stages of the Black-legged Tick will bite humans. This tick is also called Deer Tick. 

 

lonestartick.jpg

 

 

 

The Lone Star Tick (Amblyomma americanum) is found from April through fall and all stages will bite humans.  The Lone Star Tick can carry the pathogens for Rocky Mountain Spotted Fever, Tularemia, and Erlichiosis. 

 

 

The Brown dog tick (Rhipicephalus sanguineus) rarely bites humans and is not an important carrier of diseases for humans.  This tick is a tropical species and unable to survive outdoors during Illinois winters. 



Illinois Natural History Survey

1816 South Oak Street, MC 652
Champaign, IL 61820
217-333-6880
cms@inhs.illinois.edu

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