W hen Allison Baker moved to what she calls "snake heaven," a home on 2.5 acres just outside of Dallas–Fort Worth, Tex., her greatest fear was a dangerous encounter between her young children and one of heaven's residents. Baker's anxiety was understandable. After all, Texas is one of the snakiest states in the nation, with more than 80 species, 11 of them venomous. And the previous homeowners had found venomous snakes on the property, including a cottonmouth coiled by the pool. It wasn't long before she had her own run-ins with the slithering creatures—including a bite she received from a copperhead while doing yardwork. Yet despite her initial trepidation, Baker, 44, has undergone an attitude change since moving into the new place. "I knew better than to dig in a pile of leaves," she says of her brush with the copperhead. "I didn't blame the snake for it and got a shovel and flipped the snake out of there," relocating the animal rathe...