This is absolutely untrue. Most studies on cat impact on bird species are ridden with incomplete and bad data. In Germany, estimates are around 200 million bird

This is absolutely untrue. Most studies on cat impact on bird species are ridden with incomplete and bad data. In Germany, estimates are around 200 million birds killed by cats every year. But since the total population of birds is estimated at 400 million that would be every second bird! That's insane and grounds for immediate skepticism. Well, it turns out that extrapolating local results to global scenarios does not at all represent what is going on in reality. For example, while cats might kill a lot of animals in settled areas like NYC that doesn't at all mean that species are endangered as a result of it. Birds don't exclusively live in human settlements and their continental populations might barely be affected by cats as there are sufficient areas outside of human settlements where feral cats are simply non-existent or at least not a problem. Furthermore, the decline of birds is almost entirely human made - no one doubts this. Habitat loss and insect decline. Reducing the cat problem will simply not have a notable impact at all. Yes, millions of birds are killed by cats but what does that mean in the grand context if billions and billions of birds are killed by humans? It's a drop in the bucket and not worth the effort and I would ask ornithologists to name species that have been wiped out by wild cats in a continental context and not just from Smallstown, Minnesota. Disclaimer: island scenarios like New Zealand are different due to the locality of the problem. It's like trying to save ants from some dude stepping on their streets once a day while ignoring a ravaging fungus that is destroying the colony from the inside. But here you are, saying "not stepping on the ant street is also helpful!". Congrats to saving 10 ants while the colony is being decimated by a fungus.