Frogs croaking in the airconditioner.
In my days going about Townsville cleaning split systems, I sometimes come across our green frogs wanting to cool off as well.
I got 5-6 good size frogs out of this one. They were quite relaxed and did not want to move out. But I told them I was here to clean up the aircon and they had to relocate. They agreed to move on in a orderly fashion.
The aircon ran quiet and cool after a good clean.