Contact | Blog | Project Noah Facebook | Project Noah Twitter

A global citizen science platform
to discover, share and identify wildlife

Join Project Noah!

Woolly Bear Caterpillar

Pyrrharctia isabella


Dense cover of hairs over body, midabdominal segments with reddish orange hairs, anterior and posterior segments with black hairs.


Found at lower elevations in woodlands and wet forests; widely distributed in western North America and particularly common west of the Cascade Mountains.


Caterpillars are very common; feed on herbs, such as nettles, during fall and spring; overwintering, with development completing in the spring. Adults are nocturnal; fly in midsummer.

Species ID Suggestions

Sign in to suggest organism ID

1 Comment

Hello DerekSeattle and Welcome to the Project Noah community! We hope you like the website as much as we do. There are many aspects to the site and community. The best way to get started is to read the FAQs at where you can find all the tips, advice and "rules" of Project Noah. You, like the rest of the community, will be able to suggest IDs for species that you know (but that have not been identified), and make useful or encouraging comments on other users' spottings (and they on yours).
There are also "missions" you can join and add spottings to. See,o... A mission you should join is the to chose the best wild photo of 2016,only the spottings added to that mission are eligible.Note that most missions are "local". Be sure not to add a spotting to a mission that was outside of mission boundaries or theme :) Each mission has a map you may consult showing its range. We also maintain a blog archive where we have posted previous articles from specialists from different geographical areas and categories of spottings, as well as wildlife "adventures".
So enjoy yourself, share, communicate, learn. See you around :)

Spotted by

Seattle, Washington, USA

Lat: 47.66, Long: -122.29

Spotted on Jan 31, 2016
Submitted on Jan 31, 2016

Related Spottings

Woolly Bear Caterpillar Isabella Tiger Moth Banded Woolly Bear Woolly bear

Nearby Spottings

Spotting Spotting Eagle nest Eagle