Oahu Invasive Species Committee (OISC)

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Join the Devil Weed Crew!

We need your help looking for presence/absence surveys of Oahu’s trails for Devil Weed (Chromolaena odorata). OISC doesn’t have the resources to survey all Oahu hiking trails for this invasive plant, so we ask you to look for it on your next hike. Join the effort along with partners like Conservation Dogs of Hawaii and the North Shore Community Land Trust , dedicated to surveying and removing devil weed where they find it.

Volunteer on YOUR time!

We are looking for people to commit to surveying our island for Devil Weed and removing it. Being part of the crew will mean you will really get to know (and love getting rid of) this invasive plant.

This is a community-led effort to help OISC determine the spread of devil weed on Oʻahu. ANYONE can participate, anytime!!

  1. CHOOSE A TRAIL TO SURVEY.
  2. RECORD SURVEY & PLANT LOCATIONS.
  3. SHARE YOUR SURVEY DATA.

Get free swag! Stickers, hats, and if you hit 15 miles…a free t-shirt!

Searching meme

PICK A TRAIL:

Scroll down to see which trails remain to be surveyed. Feel free to resurvey trails! These plants grow quickly and plants can mature in as little as 6 months!

*This list is updated with data shared by volunteers monthly. Simply click on the trail name for a link to the trail map, status, and information page.

SURVEY AND SHARE YOUR DATA:

  1. Learn how to ID Devil Weed. Just watch this video and request your free devil weed field guide.
  2. Download the free ‘AllTrails’ app for your phone.
  3. Survey and collect your data. Pick a trail from the list below and go look for devil weed as you hike.
  4. Record and share your Alltrails survey data with OISC by email: oisc@hawaii.edu or text 808-286-4616.

Devil Weed Crew Challenge

Send your survey data to OISC and start racking up the miles. Win T-shirts, cups, and more!

Swag for Miles Challenge

Additional Information