Buildings/Windows are far more dangerious to birds than windturbines. It's really an order of magnatude problem where people see X deaths per year per turbine and think that's bad and ignore far more significant issues like domestic house cat's. For comparison consider well over 1 billion, aka 1,000,000+k birds die a year vs ~80k from wind turbines.
You end up with a larger number of deaths that is still a tiny fraction of total bird death.
Think of it this way, each turbine supply’s enough energy to meet the needs of several households. On average far fewer birds die from the turbine than the households whose energy comes from that wind turbine and that does not change as you scale up the wind turbines. Now the exact numbers depend on the type of turbine and their placement but 5+MW wind turbines are far less dangerous than their smaller and less efficient counterparts that started the whole issue. If the total energy generation needs of the US where met from large wind turbines there would still be negligible impact on birds.
PS: If you look at small turbines the blade spins so fast hit’s hard to see, if you look at large turbines the blade easy to see because huge and moving though a much larger area.
