Sexing budgies is generally easy, especially as the breeding season approaches and males and females come into breeding conditions. However, it can be tricky when they are still young checks under 4 months old. You can determine the sex of budgies by the color of their cere. When the budgie’s cere is pink or purple, this indicates that the bird is still a chick, and it is difficult for the novice budgie keeper to determine the sex or gender in this case, especially if it is not more than two months old. When the chicks finish molting after reaching four months, the color of their cere usually changes to sky blue or sky blue and white, depending on the gender.
When the cere color changes from pink to light blue, the budgie is male. But when the pink color on the cere turns to light blue and white where the white color usually covers the outer of the cere, this indicates that the bird is female.
It is worth noting that when the male budgies are ready to breed, the light blue color turns into a dark blue and becomes soft and shiny. When the females are ready to mate, the light blue white color turns dark brown with a rough texture and appearance.