Santa Ana National Wildlife Refuge in Texas to build the first stretch of the border wall .
The proposed barrier there would cut off the refuge from its visitor’s center and the rest of the country. Environmental advocates say that could have a devastating effect on the animals who live in or roam the refuge and to the residents of one of Texas’ poorest regions who depend on the tourism it draws.
“This is insane,” said Scott Nicol, co-chairman of the Borderlands Team for the Sierra Club. “This is the crown jewel of the Rio Grande Valley wildlife refuge system, with one of the highest rates of biodiversity in the U.S. If it’s walled off, with no public access, it will be left to rot.