Three Kitties - Free IncrediMail Letter Download and E-Card

Put some glass between a cat and the birds in the trees, and it starts to — chirp.
That "chattering" could be the cat expressing frustration, of course. Maybe it is trying to imitate — and attract — birds, though, or mimic bird food, say cicadas.
In any event, I've only ever heard adult cats chirp at a window, never kittens like the three half-awake in this email stationery:
›› One cat is cute. Two cats are cuter. This IncrediMail letter has three. (IncrediMail)