It's not a bullshit fact. Admittedly it can be used to bullshit by blowing it out of proportion, but it is something that happens. Calling actual issues "bullshit" and demanding they are not talked about is not a very good way of getting people on your side.

At least over here in Germany the organisations working to get more renewables deployed and studying these things massively overlap (e.g. nature clubs lobbying/advertising for renewables, and at the same time providing the boots on the ground counting dead birds). It has been recognized as a problem and is now managed, just as other environmental influences of new construction projects are (e.g. evaluating a new location includes a comparison with known migratory patterns/populations and restrictions and monitoring requirements can be set accordingly)