There is no accurate way to design a birds’ nest. All birds favor is a safe and secure place which protects them from the weather and predators. Some bird species prefer a certain location and type of nest, so the nest box can be constructed to meet those specific needs.
At the end of each breeding season, the nest box should be taken down and scolded in hot water to clean it an remove any unwanted parasites. Never use cleaning solutions to clear your nest box of filth, the chemical agents may become trapped in the nest and kill your birds. Nest cleaning should be done between October and November.