Which physical features contribute significantly to the Northern Harrier's steady, buoyant quality in the air?

Answer

Long, slender wings and a noticeably long tail

The combination of their long and slender wings relative to the body, along with their notably long tail, contributes directly to the steady, buoyant quality observed in their flight.

Which physical features contribute significantly to the Northern Harrier's steady, buoyant quality in the air?
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