No bluebird nest box is sparrow proof. You can however discourage sparrows from nesting there. Avoid places next boxes close to barns, feedlots, and farmsteads. These provide plenty off cover for sparrows. Sparrows may not like nest boxes made of PVC pipe because the interior is circle. They also dislike slot boxes.
Never known of a bluebird crawling, it would be difficult..To exclude house sparrows, make the entrance hole around one and a quarter inches across..Also, place the nest box no higher than five feet from the ground, sparrows won't nest so low.
Watch the bluebirds closely to make sure that they incubate them. Also watch out for sparrows and other birds that may crack bluebird eggs or take over the nest.
You want the bluebird box to be at least 5' in the air.
Bluebirds nest in tree cavities, or in man made bluebird boxes. The box should have an entrance hole no more than one and a half inches, and have a hinged roof for cleaning. It shoud be placed no more than five feet above ground, to exclude sparrows.
House sparrows often live close to people and will build their higgledy-piggledy nests in any crevice that they can find in houses or buildings, or in any suitable creepers that might be growing on a building. They will also use nest boxes and, as they are sociable birds who like to live in large groups, they will be particularly keen to use nest boxes if they are of the terrace type (three or more boxes joined together much like a terrace of houses). Tree sparrows tend to live more in open countryside. Their nests are much neater than those of the house sparrow and although they will also build in any suitable crevice in a building or sometimes nest box, they will also construct their nests in trees or, if near the coast, even in a cliff-face.
Wherever you keep your rabbit's nest box, it should be safe. So if it isn't safe outdoors, and it would be indoors, then yes, you should bring the nest box inside. Outside there are many dangers, such as predators, and bad weather. It's usually a lot easier to keep your rabbits safe, and to watch over their health and to make sure they're getting enough attention, when you keep them indoors. See the related questions below for more information.
In or out of what? Their nest box? They should stay in their nest box until they are able to get out by themselves. Is that your question?
A birdbox is another term for a nest box, a man-made box provided for wild birds or small animals to nest in.
yes, because they really didnt HAVE to have one in the first place, because the parents keep them warm, clean, and will make their own nest. So yes you can
Unlike chickens, ducks do not prefer to lay their eggs in a nest box. In fact, in my experience, Pekin ducks will lay their eggs wherever they happen to be sitting at the time - some will even lay an egg while swimming in the water. If you truly feel the need to provide your Pekin duck with a nest box, a simple, three-sided plywood box should suffice.
In the belfry.
You want it to be more open than wooded.