Tree Inventory 2019-2021

Volunteers Needed for Petrie Island Tree Inventory

The Friends of Petrie Island, in partnership with the Ottawa Stewardship Council (OSC) and Ottawa Field Naturalists’ Club (OFNC), is conducting a tree inventory on Saturday and Sunday, 17 and 18 August, from 8:45am to 3:00pm.  We need volunteers to help measure and record information about the trees on the island.  No previous experience is needed.

This is a great opportunity to learn about trees and the natural history of Petrie Island!  Tree experts will instruct volunteers on how to take measurements and will help with tree identification.  Volunteers will also record the location of invasive species.

This year we will focus on trees in the middle of the island, which is known for its Hackberrys and tree diversity.  Please see the current listing under the Nature section of this website.

Check out iNaturalist for more information

Inventory team leaders are:

  • Owen Clarkin – OFNC Conservation Committee Chair, well-known for his deep knowledge of trees.
  • Janet Mason – OSC Chair, field naturalist, and tree enthusiast.

Other tree-knowledgeable team leaders from the field naturalist community will be recruited to work with volunteers.

Please register ahead of time via email at

In the subject line- Attention Sherry- Tree Inventory Volunteer. Let her know what date(s) and time(s) you are coming to help. 

You can sign up for:

  • one day (Saturday or Sunday) or both days;
  • a full day (8:45am to 3pm) or morning only (8:45am to noon) or afternoon only (noon to 3pm).

We need about 20 volunteers on each day.  Recruit your friends!

Volunteer Information

More detailed information will be provided when you register. 

  • Parking will be free for volunteers.
  • Volunteers will work in pairs with support from a team leader.  You will measure the tree’s circumference with a tape measure, and record this along with its species, GPS location, height estimate, and other data.
  • Equipment will be provided.
  • Bring your lunch.  Refreshments will be provided.
  • Bring bug spray and sun screen.
  • You will be walking off-trail through bush.  There is poison ivy on the island and some areas may be wet.  Waterproof boots, long pants and socks are recommended..  Open shoes (e.g. sandals) are not suitable.