Not sure if this is helpful, but I once had an owl live in my barn, probably a Barn Owl then :D
Some birds do not build nest's .why?
why do all birds build nest
Other Birds
A song thrush usually builds her nest in trees and bushes. Some times they will also nest in man made buildings like barns as well.
prior to
So their nest doesnt get attacked
Many birds make their nest on a tree such as a Woodpecker, Nuthatch and a Tree Creeper.
The weaver birds build their nests in large colonies, and are ball shaped, with the opening to the nest at the bottom.
Themselves - it's a natural thing all birds do
cause they are really high
It isn't one way for all birds, many will build a nest to attract a mate, then perform courtship rituals then lay their eggs, others will pair up and mate, then build their nest together.
No defenitely female birds will built the nest