Bluebirds do sometimes just go in half way. They may be arranging nesting materials or doing something else. Entrance holes for bluebirds should be 1.5 inches.
Yes, but the wren may try and take over the bluebird nest.
House sparrows and wrens often compete with bluebirds for the same nesting house. Often time sparrows will break bluebird eggs or make another nest over the current bluebird nest.
Bluebird trails are lines of bluebird houses. There could be four house in a row or there could be hundreds. It gives many bluebirds a safe place to nest and lay eggs.
Clean them once the bluebird abandons the nest; usually after the babies leave the nest. If a sparrow or other bird starts making a nest over the current bluebird nest remove the materials of the nest in process. Do not clean out the bluebird house if the bluebird is still using the nest.
It can also be in the side.
I think it is John Barrowman - have been trying to find out whether I am right
Yes..Often take nesting sites from other species, like the bluebird.
It is bluebird!
The eastern bluebird is Sialia Sialis.
Bluebird is owned by Flowers Foods
Mr Bluebird a farmer
There is no such thing as a southern bluebird.