Mother birds probably sprain their own wings from the force of pushing their children out the comfort and protection of their nest then the exertion from pulling them back in before they hit the ground.
It’s hard to trust a baby birds wet wings will take flight.
But mother nature is a wonderous thing; they will take flight, they will soar, when they have no other choice but to.
It might take making a nosedive face down into life before they learn how to properly fly.
Remember, you’re no good to them mama, with casted wings. (Note to Self)