When muscles lift the wings retracted. Press the wing muscle relaxes Make the wings move.When muscles lift the wings taste Press the wing muscles contraction Making the lower wing
When muscles contract to lift the wing up. Press the wing muscles to relax. Wing moved higher on lift wing muscles to relax. Press the wing muscles to contract. Lower wing
When muscles lift the wings shrink up muscle press wing is relaxed. The wings to move upward when muscles lift the wings relaxed muscle press wings will shrink. Make ลดต่ำลง wings,