Blacklegged Tick
blacklegged ticks
Blacklegged ticks (left: female, right: male)
Photo: Jeff Hahn
Size 1/8 inch long (unengorged adult female; males and immatures are smaller)
Where/When In Minnesota it is most common in the east and central areas of the state. Found in hardwood forests and grassy fields and meadows. Larvae are active from July - September; nymphs are active from May - July; adults are present from fall through spring.
Significance Can bite humans and animals. It is an annoyance because of its bites. More importantly, it is a potential vector of Lyme disease, which is relatively common in Minnesota (symptoms can include red skin lesion, large red rings with clear center, fatigue, chills, fever, headache, muscle pain, sore throat, nausea, vomiting, and cardiac abnormalities). It is also a potential vector of Human granulocytic erhlichiosis (symptoms are similar to Lyme disease).
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