What is my cat saying?

Yeah, take a video and see what your vet thinks. It could just be your cat. Does she look like she's stalking the prey in the tree in any way? Or is she simply relating to them? My cat watches birds and squirrels, intently. But he doesn't talk to them. My cat does occasionally chirp, but he seems to do it when he's got something in his throat or when his normal meow sort of gets caught in his throat. Oh and if you take a video, post it here. I think we'd all love to see it! Maybe your cat thinks she's a bird? Haha. Where did you get her from? Maybe she was housed close to the birds at the pet store?