Eastern Bluebird (Sialia sialis) July 24, 2020 1500 × 1200 Eastern Bluebird (Sialia sialis) Eastern Bluebird (Sialia sialis) female, Jan 2020, Napeague. Breeder/year-round. January, 2020. Breeder. May overwinter on Long Island; usually found with a small feeding flock that includes chickadees.