Some birds live in a burrow in the ground; others live in a hollow in a tree trunk.
BIRDS
birds live in nests in a tree and sleep in a nest
Sometimes they can make out where a nest came from or if it is man-made or not. They will probably live there if they don't have a choice, but some birds would rather build their own nest.
Other Birds
birds nest
worms and alot of de'm
they do live in nests for about 6-7years at a time therefore whenever they leave the nests to go and build a new one other animals take over there old nest this cycle keeps repeating again and again Birds don't "live" in a nest, as a song bird may live in a cage. Birds build a nest for procreation.
they will stay in their nest for few days and go fly with adult birds and eventually live in theforest.
like most birds an eagle builds a nest
Cuckoos do this.
So they can survive from their predators, who live on ground.
Birds, they also house nest in them.