Identification • Appearance

What does a Lone Star tick look like?

A Lone Star tick is reddish-brown and rounded, and the adult female has one unmistakable white dot in the center of her back. Males instead have faint white streaks or spots around the edges. Younger stages are much smaller and harder to recognize.

Last reviewed: June 1, 2026 · Educational only — not medical advice.

At a glance

Adult female: reddish-brown with a single bright white/silvery dot.
Adult male: smaller markings or streaks near the body's edge.
Nymph: tiny (about poppy-seed sized), pale, easy to overlook.
Engorged ticks look larger and grayish after feeding.

Size comparison

Unfed adults are roughly sesame-seed sized; nymphs are far smaller. After feeding, ticks swell noticeably. Because nymphs are so small, daily tick checks are important during the season.

Could it be a different tick?

Blacklegged (deer) ticks are smaller and darker with no white dot; American dog ticks are larger with mottled patterns. When unsure, save and photograph the tick for identification.

Frequently asked questions

Is the white dot always visible?+

The single white dot is specific to the adult female. Males and immature ticks don't have it, so absence of a dot doesn't rule out a Lone Star tick.

How big is a Lone Star tick?+

Unfed adults are about sesame-seed sized; nymphs are much smaller. They swell substantially after feeding.