Big Tree Registries are community-science driven initiatives that not only raise awareness about the importance of healthy trees and forests but also help identify areas of high conservation priority, providing valuable information to encourage the protection of iconic trees.

Man walking through an old growth forest.
Photo by Alex Harris.

Pender Islands Big Tree Registry

The Pender Islands Big Tree Registry, launched in September 2019, aims to raise awareness about the rare and endangered status of Coastal Douglas-fir (CDF) forests and associated ecosystems characteristic to the Gulf Islands. It is a growing database of the big trees found around North and South Pender Islands, with plans to expand to additional southern Gulf Islands in late 2021. The registry has been modelled, with permission, after the University of British Columbia’s (UBC) big tree registry.

The CDF biogeoclimatic zone is among the most biodiverse zones in the province. It is also the most degraded. It is the least-protected zone in BC with less than 1% of its forests remaining as old growth and less than 10% older than 120 years.

Contribute to the Pender Islands Big Tree Registry

Like other big tree registries, trees are nominated by community members who collect species information along with a few simple measurements including trunk diameter at breast height (DBH), height, and crown spread. Nominations are made using the iNaturalist smartphone app, a Google Form submission, or manually using a prepared datasheet (PDF) depending on the nominator’s preference. These nominations are then verified by a qualified professional working with Raincoast Conservation Foundation to ensure measurements and location information have been accurately recorded. Findings will be used to document the biodiversity on Pender Islands and data may be useful for a number of potential projects.

Measurement guidelines

For more information on how to measure big trees, including tools you will need, photography tips, safety information, and how to measure irregular trees use Raincoast’s big tree measurement guidelines. 

Other registries

Find out about other registries from other regions.

Thank you

RBC Tech for Nature logo.

Recent articles

4 youth watch as someone draws on a whiteboard onboard Achiever.

Encouraging and recognizing youth environmental action

Raincoast and Take a Stand: Youth for Conservation launch another edition of the Student Innovation Challenge to empower youth voices and actions.
Belugas surface watchfully, together, in an inlet on a beautiful sunny day with light dancing on the water.

Too loud to talk? Belugas tune in to ultrasonic channels

New research shows that beluga whales may exploit ultrasonic signals to maintain communication in noisy environments.
Aerial shot of 5 humpback whales swimming near the surface.

DNA from dives: Species detection of humpback whales (Megaptera novaeangliae) from flukeprint eDNA

New study uses non-invasive water sampling to detect presence of humpback whales.
Chum salmon swim along the bottom of the river floor.

Policy brief – supporting freshwater salmon habitat through the Water Sustainability Act

It is important to remember that our water, and the incredible fish that return to our watersheds, are one of our greatest natural resources and are an integral part of strong and resilient local economies.