Despite its name, the throat of the Glittering-throated Emerald is not very helpful in its identification. Overall, this emerald is fairly nondescript, but the area of white on the central and lower underparts is fairly unique. Glittering-throated Emeralds frequent the borders of dry, humid, and gallery forests, and also inhabit second growth, open woodlands, and gardens. They feed on nectar from flowering plants of all heights, and even gather nectar from a perch. These aggressive emeralds breed throughout most of the year and have an insect-like song. The southeastern Brazilian subspecies (P. f. tephrocephala) is perhaps the most mobile and migrates southward along the Atlantic coast.