![]() ![]() If you need help identifying a tick, spider, insect or other type of arthropod, you may send the specimen for identification in a sealed, rigid container, such as a screw-cap vial or plastic medicine bottle, with contact and collection information using the form below.įillable/Savable PDF (works best with Reader 7. TICKS: KEY TO GENERA IN UNITED STATES Harry D. Centers for Disease Control and Prevention) Dichotomous keys are set up in a two question format, leading users through a set of choices designed to help them correctly identify the object of their inquisition. They can be used to identify rocks, plants, trees, birds, reptiles and mammals. The Adult Female, Adult Male, Nymph and Larva of Ticks Most Likely to be Found on People in Illinois (from the U.S. A dichotomous key is a system used by scientists to identify different parts of the natural world. This tick seldom bites or transmits disease to people. Of the ticks mentioned here, this is the only tick that can reproduce and become problem indoors. It feeds primarily on dogs and can be found in kennels and other places where dogs live. The brown dog tick is oval in shape and has shorter and thicker mouthparts than some other ticks. NO: This may be a brown dog tick ( Rhipicephalus sanguineus). Lone star ticks can transmit tularemia and other diseases including one similar to Lyme disease but milder. They have long, narrow mouthparts (as in the illustration above) and their bodies are somewhat round in shape rather than oval-shaped like other ticks. These ticks are more common in the southern half of Illinois. YES: This is the lone star tick ( Amblyomma americanum). A re there white markings on the rear margin of the tick’s back OR a single white spot in the center of the back?.These ticks are oval shaped and their mouthparts are relatively short and broad. ![]() On females, the silvery-white marks are found only on the scutum. The silvery-white marks streak across the backs of males from the edges of the scutum to the rear end (see illustration below). It usually feeds on dogs and other small mammals, but will bite people and occasionally transmit Rocky Mountain spotted fever and tularemia. YES: This is an American dog tick ( Dermacentor variabilis), the most common tick found throughout Illinois. Are there irregular silvery white marks in the center of the tick’s back?.They are often associated with domestic birds upon which they feed. These ticks are soft, while all other ticks mentioned here are “hard ticks.” Soft ticks rarely, if ever, transmit disease in Illinois. However, because there are many similar Ixodes species, they should be sent to an expert for species identification. These ticks can transmit Lyme and other diseases. They range from dark brown to bright red and have black legs. Blacklegged ticks are most common in northern Illinois and around river corridors. YES: This may be a blacklegged tick, also know as the “deer tick” ( Ixodes scapularis). Are the mouthparts long, narrow and visible from above the tick?.Does the rear edge of the tick appear segmented with several square plates known as festoons?.Ticks shorter than 3mm (1/8-inch) are usually immature and more difficult to identify. This key is intended to aid in the identification of unfed ADULT ticks. ![]()
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