^Probably not. If you will recall, that was the ultimate solution to the Simpson's gorilla infestation in Springfield. The gorillas had been introduced to kill the snakes, IIRC, whcih had been in to kill the mongooses, which had been brought in to kill the lizards which Bart had accidentally released into the wild. The gorillas would freeze to death once winter came, so all was good in the end.
FW: zombies are not a species. zombies are a disease. Plus, they just crave human flesh. They don't need it to "survive". However, I am uncertain just how long a zombie can "live". The half-bodied zombie in the first episode seems to me to be pretty instructive: at some point, there just won't be enough muscle tissue left for them to move. So the lifespan of a zombie is probably limited by the rate of decomposition. I would think that in a warm climate, like Altanta, they would decompose pretty quickly and become immobile within, say, a week or two.
FW: zombies are not a species. zombies are a disease. Plus, they just crave human flesh. They don't need it to "survive". However, I am uncertain just how long a zombie can "live". The half-bodied zombie in the first episode seems to me to be pretty instructive: at some point, there just won't be enough muscle tissue left for them to move. So the lifespan of a zombie is probably limited by the rate of decomposition. I would think that in a warm climate, like Altanta, they would decompose pretty quickly and become immobile within, say, a week or two.