Large, long-tailed hummingbird found on scrubby slopes in more arid parts of the Peruvian Andes. Adult male is glistening green with an iridescent rosy throat and bronzy tips to the outer tail feathers. Females and immatures are grayish underneath with green scaling and a much smaller throat patch bordered by a pale mustache. Also note the white spot behind the eye. The tail appears forked when spread.