As for the marsh rabbits, once again we have this:

"Habitat destruction and fragmentation associated with residential and commercial construction activities over the past 20 years is responsible for the Lower Keys marsh rabbit's endangered status."

http://www.fws.gov/southeast/vbpdfs/species/mammals/lkmr.pdf

HABITAT DESTRUCTION, NOT feral cats, caused their disappearance.

Of course, feral cats -- along with other predators such as dogs, raccoons, oppossums, and even fire ants -- are ADDING to the problem. But they are not the CAUSE of the problem, despite your many claims to the contrary.
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0.1 Peruvian rainbow boa (Amaru)
2.0 Brazilian rainbow boas (TBA)
0.3 Honduran milksnakes (Chicchan, Chanir, Hari)
2.6 corns (Cetto, Tolosa, TBA)
1,000,000.1,000,000 other critters