Common Whitetail male

Males and females have different wing patterns.
Immature males have the same body pattern as females but the same wing pattern as mature males.
'tween' males have abdomens that are beginning to turn blue, but the adolescent body pattern still shows through the blue.
Mature males have a short, stout abdomen that is completely chalky blue-white covering the adolescent pattern:
Females have a short, stout abdomen with several oblique dorsolateral white or pale yellow markings against a brown ground color; each wing has three black evenly-spaced blotches.