Lack the red throat, possessing instead a whitish throat and underparts.
This species is exceptionally small, measuring approximately 7–9 cm in length with a wingspan of about 10 cm. Adults typically weigh between 2 and 6 grams. Coloration: Both sexes feature iridescent green upperparts.
Distinguished by a brilliant, ruby-red iridescent throat (gorget) that can appear black in certain lighting.
Their specialized wing anatomy allows them to rotate their wings nearly 180 degrees, enabling them to fly forward, backward, and hover in place. Migration and Distribution Fracture Hunting in Ruby-Throated Hummingbirds ... - PMC
