“Feral horses and burros are invasive species in North America. Exotic, non-native species are among the most widespread and serious threats to the integrity of native wildlife populations because they invade and degrade native ecosystems.
When invasive species are perceived as a natural component of the environment, the general public may regard them as “natural,” not understanding the damages they inflict on native systems.”
— The Wildlife Society
(The Wildlife Society is a national professional organization: “The members of The Wildlife Society manage, conserve, and study wildlife populations and habitats.”)