Large, distinctive hummingbird. Males have bright blue underparts with maroon tail and downcurved bill. With a quick view, might be confused with a violetear or Green-backed Hillstar, but tail color and entirely blue underparts are distinctive. Females are grayer on the belly with a grayish mustache stripe; note maroon tail. Occurs in the subtropical zone of the Andes from Venezuela to Ecuador. Visits feeders, but also found in forests and edges.