Why is it that cats make this sound?
There are some experts believe that is somehow connected to the frustration a cat feels from not being able to reach the prey that is on the other side of the window or that it is simply a reflex motion in some anticipation of making the kill.
Yet another theory is that it’s how a cat controls excitement and frustration while watching potential prey that they cannot get to
Whatever the reason actually is behind this chattering and chirping sound it still remains one of the mysteries that cats would rather keep to themselves!