What is Tree hollow?
[[File:Holey Tree (772111164).jpg|thumb|250px|right|A naturally formed tree hollow at the base of the tree]] A '''tree hollow''' or '''tree hole''' is a [[cavity]] in a [[tree]]. Such hollows naturally form in the branches or trunks of many kinds of trees. They provide a [[habitat]] to [[animal]]s, such as [[owl]]s. Hollows in the [[tree]]s also appear under the influence of [[water]], [[fire]], [[wind]], [[lightning]]s and living beings, such as [[rodent]]s, [[mammal]]s (it can take centuries to form the hollow fit enough for the big [[mammal]]), [[bird]]s, some [[bacteria]] and [[fungi]]s. {{biology-stub}} [[Category:Trees]]