Legally the only way you can move a sparrow nest is if it is a house sparrow nest. These are not native to the US and are considered an invasive species. If it is not a house sparrow no you can't move it. The Migratory Bird Treaty Act makes it illegal. See the related link below for more information.
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.
No, this would confuse the mother bird. If you do move the eggs then they would be in even more danger because they would be with out a mother. There would be no other way then to make the cats stay back.
They are medium sized.
Only the females lay eggs.
If the Bluebird is too old or too ill to take on care of the baby birds it will leave the nest and let another bird care for them. 98% of eggs are found and raised to adulthood. The 2% of eggs that aren't found doesn't affect the Bluebird's population
Yes, but the wren may try and take over the bluebird nest.
carefully.
Cats, raccoon, foxes and sparrows killing babies.
They give many bluebirds a place to live at the same time. The population can increase because of the amount of bluebirds that can nest in that area.a bluebird trail is a group of nesting boxes. this helps the bluebirds because then they have places to live and have babies.
In a warm place at the month so you cant really tell unless you have thermometer to tell you the tempreture of any bird or any animal.
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.