One is smaller and flat-edged and native to the Sonoran Desert. The other is larger, rounder and invasive, with the potential to wreck Arizonan agriculture and wildlife. The former is a javelina ...

They root, wallow and eat everything from seeds to snakes and lambs. They're wild pigs, and the only thing keeping Arizona from being overrun by them are our vast stretches of bone-dry desert. Two ...