Giant Sequoia Snags

A giant sequoia can grow for more than 2,000 years and in that time easily earn its reputation for being one of the most massive trees on Earth. While the giant sequoia’s sheer size is certainly amazing enough, these giants continue to impress even after they die.

Giant sequoia snag.
Giant sequoia snag.

We call dead trees that are still standing upright in the forest, “snags“. These massive columns often maintain much of the living tree’s original stature, but over time both wind and fire break off parts of the dead tree and reveal bare wood. When this happens, insects and fungi slowly soften the tree and countless birds and other animals take shelter in newly formed cavities inside the snag. Often woodpeckers lead the way, drilling holes into the sides of the tree trunk. Woodpeckers create nests for themselves inside snags and these nesting nooks are later used by other birds that eager to shelter in safety of giant sequoia.

I love walking up to the base of a snag and looking for signs of the critters that have taken up residence in this giant tree from another time. These snags are each an ecosystem in their own right! Next time you’re in the forest, peek inside a woodpecker’s hole to check for a nest or glance up inside a burned-out cavity to see if any bats are sleeping inside.

About the author

Emily Burns, the League’s former Director of Science, led the research program that includes the Redwoods and Climate Change Initiative. She holds a PhD in Integrative Biology on the impacts of fog on coast redwood forest flora from the University of California, Berkeley.

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