I live at the north end of North Texas Street. My backyard is next to one of Fairfield’s water reservoirs.
Out of my kitchen window I can see very large birds circling around, and getting up higher and higher without moving their wings. They seldom move their wings. They just glide around and around and get up higher with each turn.
My question is: Can these big birds see updrafts? How else can they find updrafts?