Why is she doing that? Parasites, Playing or she hit her head?
We found this parakeet in a square. She's a young female in heat, and we decided to take her home to care for her because we already have other budgerigars
We put her in a cheap little cage we had as an emergency measure because we didn't want to put her with the rest of the budgies before making sure she didn't have anything contagious, like a parasite or if he might fight with the rest (who are a family of 3)
It would also help if you could identify its mutation or breed