Don't worry.. If the bird is acting lively, alert, eating and playing.. and has normal poops then its healthy.
The colour of the cere is to do with hormones.
Looking at your previous photos it look like the bird was a baby.. or young with the blue colour.. and now its mature is gone brown as it a hen.
The colour of the cere is to do with hormones.
Looking at your previous photos it look like the bird was a baby.. or young with the blue colour.. and now its mature is gone brown as it a hen.