It all depends on who got there first. Possession is nine-tenths of the law. Take care- if you smell a rat, there might be a stool pigeon. If it's a bird house, it should be a bird's nest. But sometimes, birds will 'fly the coop', leaving it unattended. Squirrels are rodents, too.
A nest, or a bird house.
A nest, or a bird house.
Nest
A bird house is called a nest.
Nest
in a nest
ummm...a bird house...or a bird cage...maybe a bird nest
Nest, Itz simple
If the bird built it then it is generally called a nest. If it was made for the bird by a human it is generally called a birdhouse.
You can, but I wouldn't recommend it. All of the traffic might keep the mother from sitting on the nest.
If you are referring to a physical shelter, it could be a nest, or bird house. If you are referring to a shelter wear they are protected, it could be a reserve.
A nest, or a bird house.