The Redwoods have remarkable resilience. They are nearly immune to insects, decay and fire. They have a thick bark (up to 12” thick) that provides protection, it contains a resin that is distasteful to termites and insects. When exposed to fire the bark chars and turns into a heat shield of sorts. What an amazing tree.
Hard to believe but this Redwood is still alive and thriving, the branches on top looked like any other healthy Redwood. These cavities have been caused by fires over many years. Intense fires can penetrate the bark through cracks, the heartwood in the middle of the tree is "empty wood or dead wood", the tree gets it's nourishment from the outer wood under the bark.
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