Big Tree Registry

Photo by Alex Harris /
Raincoast Conservation Foundation.

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. 

Measurement Guidelines (PDF)

Other registries

Find out about other registries from other regions.

Other registries

Thank you

RBC Tech for Nature logo.

Recent articles

dummy-img

Grizzly Politics in British Columbia

Raincoast has attained a copy of a soon-to-be published opinion piece that calls for the grizzly bear to be de-listed from the US Endangered Species Act. The opinion piece is scheduled to appear in the next issue of the International Bear Association’s official publication, urging the association’s membership to support the Bush administration’s proposed grizzly…
dummy-img

What Comes Around, Goes Around

As I set out, at first all I hear are the drips from my paddle as I enter a secluded lagoon. After several hundred strokes,however, their howls begin to echo along the rolling hills on either side of me. I’m searching for signs of the elusive coastal wolf near an estuary sheltered from the powerful…
dummy-img

You Are What You Eat

Our grizzly bear field crew canoed leisurely down the winding Koeye River, in search of not only the elusive bear itself, but all the evidence it had left behind. Our paddling became soft and rhythmic, yet our eyes scanned each shadow beneath every cedar, and our ears were tuned to any wrestling of leaves or…
dummy-img

The Longest Journey

“You only get one propeller,” someone shouts half-jokingly as we head off from his dock towards Roscoe Inlet.  We are all excited to finally be starting Raincoast’s juvenile salmon migration project.  As we cruise the boat near the shore in search of salmon fry that have recently left their spawning streams for the open ocean,…