Experience teaches that I should include some qualifiers with respect to the previously-given death-toll inflicted by invasive felines, because some nitwit with a lot of emotion but no science will make specious objections if I don't.  The horrific destruction will of course vary regionally and according to prey availability.  For example, I live in Alaska.  We have no reptiles, so I wouldn't expect free-roaming cats to be killing them.  Similarly, Florida is overrun with exotic reptiles thanks to the pet trade--to where there are now twice as many exotic reptiles established there as there are native reptile species.  So one would expect exotic reptiles to figure more prominently in the kill-counts.  Doesn't help the native green anole (Anolis carolinensis), which is one of the most frequently cat-killed species.  Nor does it affect the Alaskan kill-count in terms of numbers.  No reptiles means there will simply be more native mammals and birds among the slaughtered.