If placed along a highway, a bluebird house should open parallel to, or away from, the road so the birds will not be hit entering or leaving their nests. Also, the openings should face toward a tree or shrub within 100 feet so young bluebirds have a place of safety for their first flight. Convenience. Bluebird houses should face open areas with few trees and low vegetation. This lets the birds see and capture insects.
leftover - a small part or portion that remains after the main part no longer exists remnant remainder, residual, residuum, rest, residue, balance - something left after other parts have been taken away; there was no remainder; he threw away the rest; he took what he wanted and I got the balance
3. countable noun [N from n] If you say that something is a leftover from a past period of time, you mean that it has its origin there and still exists even though most other things connected to that time have disappeared. ...a leftover from the time our planet was first formed. He dragged a foot when he walked, a leftover from polio.