I don't have a cat . . .

I don't generally spend time reading research on what I have seen with my own eyes, and I have watched TNR work over and over again. And I have seen the results of trap and kill policies, which are simply dozens of cats awaiting execution in a shelter while the streets and fields are still full of ferals, a quarter of which are pregnant at any moment. Whether or not TNR is a perfect solution, decades of killing have made it clear that killing feral cats produces no benefits to anyone because it simply does not work. This is why communities that have slaughtered cats by the thousands, year after year, are switching to TNR. They still have a feral problem, because they have killed and killed and killed and accomplished nothing. And yes, that means more birds being eaten.

Of course, it is harder when surrounded by those who produce a steady stream of unwanted cats. The real solution in the end will need to include spaying amd neutering the tame cats that are producing the ferals, as well. More forward thinking communities are also working on that by providing low cost/free spay and neuter, especially in targeted areas.