It simply needs to get used to its surroundings, which may take anywhere from a few days to several weeks.
01.
Stop playing, and make sure that you don’t sound affectionate so that your bird does not think that you are complimenting it.
02.
Budgies can become very territorial. If it thinks that you are trying to take stuff out of its space, it may become defensive.
03.
Your bird will feel sexual tension that will cause it to act out. If you only have one budgie, it may even start to think that you’re its mate and will become very bonded to you.
04.
Your budgie might also bite you if you’re going to put it back in its cage. This also has to do with boredom.
05.