The term "bluebird" typically refers to small birds belonging to the family Turdidae, particularly the species Eastern Bluebird and Western Bluebird. These birds are known for their vibrant blue plumage and cheerful songs. They are commonly found in open woodlands, fields, and gardens across North America. Bluebirds primarily feed on insects and berries, making them important for pest control and seed dispersal. They are cavity-nesters, often using old tree holes or man-made birdhouses. Their presence is often associated with good luck and happiness in various cultures, symbolizing joy and renewal.