Approximately how high above the ground does the Northern Harrier typically fly while systematically quartering the ground?

Answer

10 to 30 feet up

The Harrier patrols or cruises close to the ground, typically only 10 to 30 feet up, allowing it to flush out small prey hidden in dense vegetation.

Approximately how high above the ground does the Northern Harrier typically fly while systematically quartering the ground?
behaviorbirdraptorHarrier