This story was originally published by Canada’s National Observer and is reproduced here as part of the Climate Desk collaboration.

Elijah Washington pushes through wet ferns and branches left by logging, crossing the mossy forest floor on Haida Gwaii. He kneels beside a massive western red cedar stump.

The cedar was felled decades ago during the industrial logging boom that cleared swaths of old growth across the archipelago off British Columbia’s north coast, leaving a hollow, decaying stump.

Its top has since been trimmed with a chainsaw to fit a plywood sheet, capped with weather-resistant roofing material and covered with thick green moss collected from the surrounding woods. Near the base, an opening roughly the width of Washington’s safety helmet leads into a sheltered hollow lined with moss.

“You just want it to be small enough for a mother bear to move in,” said Washington, a stewardship technician with the Haida Nation. “So it’s got to be just right, just like the Goldilocks, [the entrance] can’t be too big, can’t be too wide.”

The retrofitted stump is one of seven the Council of the Haida Nation had modified this summer to provide winter shelter for the coastal black bear, known in the Haida language as taan. Found nowhere else in the world, this subspecies of black bear is among the largest in North America.

A bear’s winter den may bring to mind a rocky cave, but coastal black bears in BC rely heavily on large old-growth trees and the hollow logs and stumps they leave behind. Decades of logging have removed many of those shelters, however—and the younger trees growing in their place have yet to develop hollows large enough for bears, said Helen Davis, a wildlife biologist working with the Haida Nation to identify and restore bear dens.

Cubs are born weighing about a pound, with their eyes still closed. They need a dry, protected place where their mothers can nurse them through the winter, and they stay there for up to 100 days. “The only place where bears can have babies is in a den,” Davis said. “And so these dens are critical to population sustainability.”

The old trees bears need for shelter are also sought-after by the logging industry. BC has expanded protections and temporary logging pauses, but old-growth harvesting continues. In August, BC Forests Minister Ravi Parmar said stopping it altogether would shut down the sector.

Davis has heard that argument for years. People repeatedly suggested making shelters from melted tires or culverts instead of leaving old-growth trees for bears.

“People would just sort of throw that out somewhat frequently and since nobody seems to want to conserve old growth for them, I was like, ‘Well, fine, then let’s see if we can build them,’” Davis said.

Now, the first-of-its kind program could set a model for bear conservation worldwide. But in providing an alternative to simply protecting old-growth, some worry building dens gives an easy excuse for logging to continue without pause.

© Mother Jones