How to Tell the Age of a Budgie?

A- Look at Budgie’s head. In a young budgie, one of less than 3 or 4 months, he’ll normally have a completely stripey head. As he gets older, the stripes on his face and forehead are replaced with plain patches of color or pure white. 

B- Look at Budgie’s eyes. The pupil will be black but the surrounding iris changes color. In budgies under 4 months old, the entire eye will be black. Between 4 and 8 or 9 months, the iris will be a little paler. Very pale irises usually indicate a bird who has reached the grand old age of at least 8 months.

C-  Look at Budgie’s Ceres Young Budgies ceres are pinkish, almost translucent. Adult Budgies have well marked cere colors. It is blue in males and chalky white to brown in females.
Exception: Recessive pied and ino males retain their translucent pink cere. Always check other pointers.

 D-  Look at Budgie’s Throat spots Baby Budgies have small, irregular throat spots. Adult Budgies have round well defined spots.