F. x. olallae, F. c. crassirostris, F.c. Male has blue on upper- and underwing coverts and rump. There is no blue in the eye area. Females difficult to distinguish from other species though there is information that their underside has more yellow. Light Green-Yellow with face, throat, and forehead bright yellow.
Males have cobalt blue on rump and wings as in other species.
They have brown eyes and flesh to pink colored legs. Yellow-faced Parrotlets are known by some American breeders to be a variety of the Pacific Parrotlet. Some European breeders believe them to be a species by themselves. Sclater s Parrotlet, Schomburgh s Parrotlet. The male is emerald green, with greater flight feathers and greater wing coverts dark green.