Found in a wide diversity of habitats, ranging from open woodlands to brushy chaparral habitats.
Upperparts greenish in color, dusky white below with greenish wash. Note red throat and crown in male. Learn the squeaky, insect-like song; at first, it is easy overlooked, but once learned it becomes a valuable aid in identification.
Nests in trees or shrubs. Nest is a cup-shaped structure built from plant down and spider's silk. Feeds on flower nectar, small insects and spiders.