yes they would be just as fertile as a non mix I even heard of two frog sub species that benefited from hybridizing
Quote Originally Posted by Zephyr View Post
Sub species would most definitely produce offspring, more or less capable of reproducing; I successfully ((accidentally mind you too!)) crossed Thamnophis marcianus marcianus with Thamnophis sirtalis sirtalis and all of the babies were born healthy with no deformities aside from one. As far as if they're fertile, this would be risky to test.