image shows a hole in a tree bark. A tree hollow or tree hole is a semi-enclosed cavity which has naturally formed in the trunk or branch of a tree. T

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image shows a hole in a tree bark. A tree hollow or tree hole is a semi-enclosed cavity which has naturally formed in the trunk or branch of a tree. They are found mainly in old trees. ree cavities are often the result of an injury followed by decay. also serves as nests to birds like owls.

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Photo credit: © NNStock / Alamy / Afripics
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