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Snag trees and healthy ecosystems

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Snags and dead trees provide many benefits to wildlife and forests.

How is a dead tree good?

Standing dead trees, called snags, provide birds and mammals with shelter to raise young and raptors with unobstructed vantage points.

As forest ecologist Jerry Franklin, likes to say: "A dead tree is more alive than a live tree." Alive with critters from large to small, that is! Or as the Washington Department of Fish and Wildlife notes, "Dead wood brings new life."


Hundreds of native birds, mammals, amphibians, reptiles, and nearly all fish – because of the beneficial effect of snags on watersheds – benefit from snags for food, nesting, or shelter. 

Help us stop harmful "snag-felling" in Washington!

Only 30 bird species are capable of making their own nest cavities in trees. The pileated woodpecker is a famous example. Another 80 animal species – like fishers – depend upon previously excavated or natural tree holes for their nests. Some, like wolverines, count on deep drifts piled around natural obstructions like dead tree trunks to dig their deep dens in winter.

The insulation of a tree trunk home allows wildlife to survive high summer and low winter temperature extremes.

Tree cavities and loose bark are used by many animals to store their food supplies. And insects living in dead wood eat thousands of forest pests which can harm living trees. Fish and amphibians also hide under trees that have fallen into the water. This aquatic "structure" provides important shelter for juvenile salmon, steelhead, bull trout and many other fish species. 

Woodpeckers and creepers feast on the wood-eating insects and provide "sawdust" for ants to process. Deer and mountain caribou eat the lichen growing on the trunks.

Whether created through natural processes or active forest restoration, standing and down dead wood play an important role on the landscape. 

Preserving snags and habitat

We are working with partners to increase awareness of the importance of snags, and ensure that forest management policies on our public lands protect the values they offer. Currently in Washington, three national forests still allow the felling of snags on portions of their lands for firewood unless there are active cavity nests in the tree - the Okanogan-Wenatchee, Umatilla and Colville National Forests (click here to see a map of acreage open to snag felling in Washington).

Due to the policies mentioned above and a lack of enforcement capacity, researchers have documented not only the continued loss of snags on the landscape but the removal of trees providing home to wildlife such as the black-backed woodpecker, white-headed woodpecker, Pileated woodpecker, Lewis' woodpecker, and American three-toed woodpecker.

We understand that firewood gathering is an important activity for campers and those living in rural areas, but it's important to leave snags standing and only gather downed dead wood from the forest floor!  

While there is important social and economic value to firewood gathering and recreation on these national forests (and often some ecological benefit from firewood removal of small fuels), the removal of standing dead wood should not be allowed due to their high value on the landscape.

Join Conservation Northwest and the Yakima Valley Audubon Society in asking the Regional Forest to end snag-felling on National Forest lands in Washington state. Please sign the petition today

Learn more about snags


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