Wow that’s amazing! But not surprising. I don’t find it at all surprising that any animal is intelligent enough to plan something.Never doubt the abilities of hawks. Here’s an interesting observation on the smarts of a Coopers Hawk adapting to the urban environment in New Jersey, using crosswalk sound cues and the line of cars as cover to hunt a certain spot across the street.
https://www.sciencealert.com/new-jersey-hawk-develops-clever-hunting-strategy-using-traffic-signals
After mall I have watched my horses plan how to escape their stalls and paddocks!
And now the chooks - they are truly devious!