The bird sound or the squirrel chirp is a high-pitched sound done by a rapid vibration of the side of your lip.
Standard Beatbox Notation (SBN)
{ ^pp }
How it's done
- Tighten one side of your lip like you're smirking very hard
- Without breathing in with the lungs, build pressure and pull air in through the tightened side of the mouth
- Practice prolonging the vibration
If its ok. I have a new sound or RAT sound. Try to suck in air while the lips are closed, and open the upper lips slightly. Sorry if it’s not similiar