Living "in the wild" is a peaceful yet exhilarating experience, and I wouldn't trade it for the world. Every day I feel blessed for our life in the midst of a forest. Still, life with cats in the wild has its cost in terms of potential dangers to those cats, especially if they are allowed to venture outside. Sure, we can't protect them from every possible hazard, but it would be irresponsible while knowing the dangers, to allow our cats to be exposed to them by letting them run loose outdoors.
For most of my adult life, the major wildlife dangers to our cats were hawks, bats, and coyotes, all of whose habitats our communities had invaded.
The following list is not all-inclusive and is limited to North America. As I have no way of quantifying the cpmparative dangers of the respective creatures mentioned, the list is alphabetical.
I am indebted to About.com Guide Laura Klappenbach for her extensive collection of articles used here as resource, and highly recommend her Animals/Wildlife website for anyone interested in exploring the wildlife of the world.