Sexing Parrotlets is rather easy. All males have a royal-cobalt blue
coloring located on the rump (back), above the eyes, and on their wings. The female Parrotlets are solid in color.
solid yellow color (no blue markings) is a female. A Parrotlet with royal cobalt blue markings located on the rump, eyes,
wings would absolutely be a male Parrotlet. The only Parrotlet which requires DNA sexing and can’t be done visually are the Albino Pacific Parrotlets (bright white w/ red eyes).