I’m guessing that these birds are on the tail end of evolution. They should have gotten south a few hours earlier.
The early bird gets the worm and the late bird gets his tail feathers frozen. With frozen tail feathers you can’t fly so you fall into a tail spin, speed increases as you fall and you start to sweat form fear, the sweat freezes and you hit the ground like a hail stone.
The last fish I ate was dead.Why do you want to fish like that... won't it kill the fish?