The gray sable wing or grey-breasted hummingbird lives in the undergrowth of the tropical humid forest, on the edges of tall forests, near streams. It measures between 13.5 and 14.5 cm in length. It weighs an average of 8.5 g.5 Neck, chest and belly, greyish; green back; green crown with dark spots. Wings with slate-colored primaries and secondaries, green tertials; its name comes from the long feathers on its wings