Two problems with falling birds and dead fish..
They fell while in flight in the middle of the night when they should have been on the roost, only one type (Red wing Blackbird) was affected.
The fish killed near Ozark were all Drum. No other species affected as far as I know.
For about the first 3 weeks when they return, I get them flying into my back bay window. They just BANG into it..Its surprising none have broken their necks yet..sometimes after they hit the window, I find them sitting on my deck squawking.
It seems that they quit about the time the female starts sitting eggs. But they have done this for the last 10 years I have lived in this house.