What physical characteristic allows the condor to cover vast territories while expending minimal energy?

Answer

Efficient soaring utilizing thermal updrafts and ridge lift

The condor's structure is optimized for efficient soaring, allowing it to capture thermal updrafts and remain aloft for hours, sometimes flapping wings less than once an hour.

What physical characteristic allows the condor to cover vast territories while expending minimal energy?
birdappearanceanatomycharacteristiccondor