I had the same question some time back. Apparently pretty close to the same time of year too. I haven't noticed any this year yet, but I'm sure they are about.
https://www.okshooters.com/showthread.php?180043-Do-hawks-run-in-packs&highlight=kite
https://www.okshooters.com/showthread.php?180043-Do-hawks-run-in-packs&highlight=kite