eastern hemlock infested with hemlock wooly adelgid

Community Science Volunteer Day: Hemlock Wooly Adelgid Monitoring

Marsh - Billings - Rockefeller National Historical Park

Special Event
  • Apr 3, 2026 at 9:00 AM
  • Free

Register

Registration is required by submitting an application on volunteer.gov, emailing mabi_visitorservices@nps.gov, or calling 802-457-3368.

Join natural resources staff to help monitor trees for the presence of Hemlock wooly adelgid (HWA).

Hemlock woolly adelgid (HWA) is an invasive aphid-like insect that feeds on hemlock trees, resulting in the tree’s defoliation and eventual death. While HWA has been confirmed in Windsor County, VT and Sullivan County, NH, the National Park Service has yet to detect it at Marsh-Billings-Rockefeller NHP or Saint-Gaudens NHP. Considering the substantial risks that HWA poses to hemlocks, the parks conduct annual monitoring. Any early detection will allow natural resource staff to protect these invaluable trees and we need your help.

Volunteer to assist natural resource staff inspect hemlock branches at 12 different monitoring location. Monitoring will take place at Marsh-Billings-Rockefeller NHP on Friday, April 3 and Saturday, April 4 from 9am to 1pm. Additionally, monitoring at Saint-Gaudens NHP will be held on Thursday April 2 from 9am to 1pm. Volunteers may sign-up to volunteer for 1, 2, or 3 days - please indicate your preference when you register.

Be prepared to hike on and off trail over rough, steep, and uneven terrain in the snow. Please dress appropriately for outdoor weather. Bring a water bottle, snack, and snowshoes/microspikes if possible. This event will continue snow or shine. We will have adult and children’s snowshoes as well as microspikes available if needed.

What to bring:

  • Winter boots (sneakers not recommended; expect snow)
  • Snowshoes or microspikes (if you have them)
  • Trekking poles (if you have them)
  • Water bottle
  • Snacks
  • Small day pack or hip pack
  • Warm clothing and layers

Registration is required by submitting a volunteer application, emailing the park, or calling 802-457-3368. Volunteers must be age 16 and above. Anyone under age 18 must be accompanied by a legal guardian.

More information

Fees

This event is free to attend.

Location

Marsh-Billings-Rockefeller National Historical Park: Forest Center Parking for Marsh-Billings-Rockefeller National Historical Park is at Billings Farm & Museum, just off Route 12. To enter Marsh-Billings-Rockefeller National Historical Park from the Billings Farm & Museum, take the paved path next to the flag pole, walk up and cross Elm St via the crosswalk, take the right fork, and walk up the short trail to the Forest Center.

Latitude and Longitude 43.632612, -72.518322

Schedule

Date:

Apr 3, 2026

Time:

9:00 AM

Duration:

4 hours

Event Type

  • Volunteer Event
Tags: mabi, volunteer, hwa, community volunteer day, citizen science, vermont, hemlock wooly adelgid, invasive species removal, forestry, volunteers in parks