chickens close to ground deal with slower wind velocities than we do. friction with ground. they are also more aerodynamic, well maybe not silkies. My birds, some which are strong fliers, seem to avoid flying in high winds, otherise that can get up to speeds that make landings and avoiding objects difficult. My chickens also tolerate high winds better tha some of their coops. Last wind event sent several of my coops tumbling a couple hundred yards. Chickens stayed put unharmed.