>You’re probably aware that in North America alone for all cats kill between 10 and 30 billion native birds and small mammals a year
and how many of those birds and mammals were old and ill and would be killed by other predators in similar situation in non-developed areas? Why didn't you specify that comparative number? May be because that would have shown that the cats are just doing the job of other predators pushed out by humans?
Btw, the cats kill up to 4 billion birds annually. At the same time 3.5 billion birds die hitting glass of the buildings. Cats kill old/ill. The birds hitting building aren't majority old/ill. Thus killings by cats are mostly beneficial to the bird species while glass buildings make tremendous damage to the bird species.
and how many of those birds and mammals were old and ill and would be killed by other predators in similar situation in non-developed areas? Why didn't you specify that comparative number? May be because that would have shown that the cats are just doing the job of other predators pushed out by humans?
Btw, the cats kill up to 4 billion birds annually. At the same time 3.5 billion birds die hitting glass of the buildings. Cats kill old/ill. The birds hitting building aren't majority old/ill. Thus killings by cats are mostly beneficial to the bird species while glass buildings make tremendous damage to the bird species.