While the numbers killed by wind turbines is less than by the fossil fuel industry, that's hardly excusing it.
Simple measures like painting just 1 out the 4 blades black red reduces bird kills by 72%, especially predatory birds. Other colors, including UV reflective paints (which can be seen by birds and not humans) also help, as well as ultrasonic deterrents for bats, etc, can help reduce motalities. Not sure about insects though. But they're not as cute so people don't care.
https://abcbirds.org/blog21/wind-turbine-mortality/