The jagged granite peaks of Arizona’s Tinajas Altas Mountains, reminiscent of the Iron Throne in the television series Game of Thrones, are almost insurmountable to humans. But bighorn sheep have long climbed through them with ease—until their path was blocked by a 30-foot-high steel fence built atop a blasted-out right-of-way on the U.S.-Mexico border last spring.
Just to the east, federal contractors have built more border fencing through the habitat of the endangered Sonoran pronghorn in the Cabeza Prieta National Wildlife Refuge. And in South Texas, sections of wall continued to rise in protected areas of the Lower Rio Grande Valley in recent months, increasing flooding risks and bisecting the subtropical woodland habitat of endangered ocelots and jaguarundis and other imperiled species.
https://www.scientificamerican.com/article/some-ecological-damage-from-trumps-rushed-border-wall-could-be-repaired1/