A tree hollow is a hole or cavity in a living tree. While it may seem like a detriment to the tree, it's an important part of the surrounding environment.
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Tilleul de Gérouville is an an ancient tree hollow you can sit in
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A bird is sitting in a hollow in a tree photo – Free Bird Image on
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Tree hollow Stock Photos, Royalty Free Tree hollow Images
tree hollow - Wiktionary, the free dictionary
Tree Hollows
