What flight mechanic allows the Condor to be a master of effortless soaring and gliding?

Answer

Special tendons that allow it to 'lock' its extended wings.

The Condor's massive wingspan is coupled with special tendons that allow it to lock its extended wings, making it suited for riding thermal currents with minimal flapping.

What flight mechanic allows the Condor to be a master of effortless soaring and gliding?
birdCaliforniaeaglecondor