The need for Speed!
This wing outlook is unique to Falcon, that’s how we differentiate Falcons to Eagles to Buzzards to Harriers.
Eagles: Have a long, broad wing span and massive feet.
Kite: Have long wings but relatively weak legs.
Falcon: Have long pointy wings and tends to be a very swift flier
Hawk: Have a long tail for tight steering. Their flight is an accipter like pattern of intermittent flaps and guides.