I know where you live!
Even cute, cuddly house cats are natural predators who will stalk and strike any poor animal at any given time. This means your pet bird is not safe from your pet cat, or at least, that would be the case if birds couldn’t fly. As you see in this picture, the endless squabbling between birds and cats ended up with birds on top.
The look on this cat is of pure confusion, like “Where did the bird go?” or “How did I end up here?” You followed your natural instincts and pounced on a poor bird, but it wound up getting the best of you.