Most cats I've known don't kill much. They might pounce on a lizard or fly to catch it and play with it, but I can't remember the last time I've seen them actually kill something. Certainly never gotten the fabled "gift" of a dead animal from a disappointed cat who thinks I can't get my own food. I wonder what the difference is.
When they were young our female would hunt quite a bit, certainly several times a month. Our male was hopeless at it, occasionally bringing back a live mouse and then not knowing what to do with it.
Now they have got older we have not had so much as a single mouse in a couple of years. I'm fairly sure I've seen more spiders as well.
I would be more inclined to call the behaviour brave and desperate rather than smart because it doesn’t always work out well for the birds.
this just made me think of the movie Annihilation where the bear like creature got a human like voice. that would definitely make a walk in the woods a lot more creepy.
Cats even have a faster average reaction time than snakes.
Here's a cat batting at a snake: https://www.youtube.com/watch?v=ptJpLivNyoE
From personal experience. Came home on a hot summer day. Let the cat loose and it immediately began to act unusual and drew our attention to a snake that had made it into the house. "Petals" ended the snake in short order without much fanfare.
I keep my cats indoors (we take them in to the garden from time to time under supervision) for a variety of reasons one of them being fluffy cute little murders who kill birds and such just for sport...
There are also birds which are smarter then cats where "killer instincts" don't work on. For example I've seen magpies "play" with cats to lure them away from their young. From the interaction it was clear the magpies were employing strategy while the cat was just reacting.