Many birds make their nest on a tree such as a Woodpecker, Nuthatch and a Tree Creeper.
in a tree
depends on how big the tree is....
in a nest or on a tree duah
birds live in nests in a tree and sleep in a nest
The siblings in a birds nest are called a brood, and when a bird sits on her nest it is called brooding.
Te specific study of the birds nest is calle "ornithology".
It is in the tree top.
The nest is a chamber in a tree which is chiselled out by both birds
A nest, or a bird house.
Most of the time a birds nest is camoflaged in a tree or other place where the bird and there young cant be seen!
Birds, they also house nest in them.