Possibly, your bit of data prediction, indicates that as wind turbines get more efficient, each Megawatt-hr of energy produced, should show fewer bird kills. The advent of gearless wind turbines, providing 15% to 25% greater energy efficiency output, should NOT show a similar increase in bird kills, if any at all. Likewise, taller wind turbines, able to produce 10 times more energy than less tall wind turbines, will not kill 10 times more birds. Matter of fact, large, efficient wind turbines of the future, with great enough concentration, will KILL..... hurricanes, in the right circumstances.
I'll source that to abcbirds.org Actually future of bird/turbine problems is difficult to predict (for reasons mentioned above), and funded research into the matter could turn up new good ideas. Following article looks at wind and other green energy sources: ScienceDirect
The decades of fossil fuel air pollution, health & renewable energy work highlighted by Dr. Mark Jacobson & his science teams & the direct opposition the fossil fuel industry has taken against him, is exactly the broad subject this thread dances around: Mark Jacobson Has A Plan To Convert The World To 100% Renewable Energy. Is It Realistic? | CleanTechnica
In June 2017, in a related thread, I mentioned Jacobson's and Clack's work "Electrical energy past and future" But if discussion can be stimulated about those matters by bringing them up again, great.