How many bluebird houses per acre to ensure optimal nesting? Find out the spacing and habitat tips for a thriving bluebird ...

Despite their cute appearance, house sparrows are invasive and can cause more harm than good. Here's what to do to keep them away from your birdhouses.

The eastern bluebird is a species familiar to millions in eastern North America. Polytypic. Length 7" (17.5 cm). Male: bright blue above, with orange throat, ear surround, chest, sides ...