It’s a persistent myth, and recently back in vogue due to the tweeting of a certain orange personage, but wind farms as bird-destroyers are not worth worrying about.
However, according to the Royal Society for the Protection of Birds, there's no evidence cats are causing problems for bird populations in the UK at least.
https://www.rspb.org.uk/birds-and-wildlife/advice/gardening-...
This might be different elsewhere though.
And the bats are at risk too https://www.oregonlive.com/environment/2019/09/oregon-state-...
I still think these wind farms are vastly positive, but we should recognize the problem with bird populations, and find clever ways to mitigate it, instead of putting the question aside just because "the bad orange men" said this was happening.
https://science.howstuffworks.com/environmental/green-scienc...