i have always known it to be the color of the band right above the beak,,: if it is blue color it is a male and if it is a pinkish color it is a girl The band can also be a purple color in which case...
The male (Boy) parakeets have a BLUE nose/cere (right above the beak)
and females have a PINK or BROWN nose/cere, and babies are white, purple or in between so you will not be a ble to tell until...
their nose (cere)
if female: brown or pink if male: blue
(the older the parakeet, the heavier the color of his/her cere; the younger the parakeet, the lighter the color.)
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