Yes, Charlie has an amazing array of sounds, and the chirp is definitely one of the most adorable. He chirps so much that he has earned the nickname Charp.
My cat chirps when I disturb her sleep or scare her! So sometimes I come up and pet her and she makes that sound! My other cat michie when she was really young once was chirping when she saw a fly then she bit the wall and her tooth fell out and she chirped Again, I got scared for a split second then picked her tooth up and I forgot where I've stuck it. but it was just a baby tooth! I love it when my cats chirp, its amazing they can make all these sounds.