Any time of year is a good time to put up a bluebird nest box, however most bluebirds start looking for nesting sites in mid February to mid March, and nesting can begin right after that. Your Location whether bluebirds are familiar with your yard can also impact when they start looking.
Tag: BBhouse
Two-holed Bluebird Nest Boxes: 2-Holes or not 2-Holes, That is the Question
Because house sparrows pin birds down while attacking in a nest box, two-holed bluebird nest boxes don’t always allow escape. A second hole may make it easier for predators to invade. But there are other advantages to these boxes such as ventilation, light availability, and feeding efficiency.