When you see a flock of hawks flying together it means a kettle of hawks.
The flock of hawks or kettle of hawks are taking advantage of rising thermal air currents, and you may see dozens (and, during migration, up to thousands) of hawks soaring together in the right conditions.
It makes the hawks flying easier when they fly together instead of alone.
These swirling, circling flocks of hawks are called “kettles.
And by watching for these gatherings, the hawks can more easily find thermals, minimizing their need to flap on their long journeys.