TallMikeM said:that'll be a no then.
I'd urge you not to put words in my mouth. It is not a no it's what it says. No one on this thread has said cats are a "major" cause of decline in bird numbers. They are indisputably a needles contributing factor and indeed a major threat to some rare species in some places as the article you link to says.
If figures like 275 million prey items a year from something that is supposed to be fed by its owners seems acceptable and not a total pointless waste I can't help you!
Most of these figures come from the Cat Protection League as they didn't like a report by the mammal society that villified cats they produced one of their own to take the heat off; they are not scientific.This is; http://www.songbird-survival.org.uk/assets/news/press-release-07.06.pdf
Even they, though, say
The older a cat is, the less likely it is to hunt
The better condition a cat is in, the less likely it is to hunt, and
Cats kept indoors at night are less likely to kill.