Chattering
Have you ever noticed your cat making funny chatter noises when there’s a bird in the yard? No one’s too sure about why they do this but it’s speculated that their vocalizing excitement at seeing potential prey fused with the annoyance of not being able to jump on them! Cats can also make other noises like chirping, hacking, and yowling when encountering birds and insects so keep an ear out for it!