Quote Originally Posted by d_virginiana View Post
Okay, yes garters VERY occasionally interbreed in the wild where ranges overlap. This rarely happens, however. There are reasons for differentiation between species; in this case the reasons are primarily geographical and temporal (meaning that slight differences in timing of mating season and brumation could come into play keeping them separate in the wild as well).

It is a concern within the hobby, but also because basically anywhere in the continental US as well as parts of Canada, garters are native. Any escaped or released animals can interbreed with the wild ones in that area (even if they aren't native to it) contaminated the wild gene pool. I'm an ecologist, and that's really serious business that can cause negative effects in wild populations.
what are the negetive effects?