anything can live in trees like animals and even people
Apples are living things. They grow on apple trees. They have seeds inside of them that can grow more apple trees.
Sapsuckers (a species of woodpecker), lives inside of living hollows of trees and drinks the sap. Basically.
An Iguana is a large lizard that lives trees in Cental America
Animals that spend most of their lives in trees are nown as arboreal.
trees
birds squirelles
a thrush
Some trees bear seeds inside fruit and some bear seeds inside pods or cones.
Pine trees
in lives in trees
In trees.
Dryad