Rocky Mountain wood tick
The Rocky Mountain wood tick is a small, flat, brown tick shaped like a pear. It waits on plants and climbs onto animals and people that brush past, then drinks their blood. It lives in the Rocky Mountains of North America.

How big is it?
How long is it?
How big is Rocky Mountain wood tick compared to YOU?
Just maths in your browser. Nothing is saved or sent anywhere.
How fast is it?
Fun facts
It finds animals by sensing the breath they breathe out, plus warmth, light and damp air.
A female can stay attached and drink blood for 5 to 15 days.
When she is full, she can grow almost three times bigger.
One female lays about 2500 to 4000 eggs.
Most asked questions about Rocky Mountain wood tick
?How can I keep ticks away?
Wear long clothes in the woods and tall grass, and check yourself carefully when you get home.
?How big is the Rocky Mountain wood tick?
It is only about 2 to 5 mm long before it feeds.
For bug experts
- Scientific name
- Dermacentor andersoni
- Group
- Scorpions, ticks and friends
- Family
- Ixodidae
- Classification
- Arachnida > Ixodida > Ixodidae
- Lives on
- North America
Where the facts come from
- Dermacentor andersoni (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
- Picture by Daktaridudu. CC BY-SA 4.0, Wikimedia Commons. The round sticker of this bug is cut from the same picture.
If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.