Exactly something like this should happen, so that walls allow non contiguous fencing segments ... since the other solution
https://www.tgoop.com/BorderWallEcocide/34
is even not really a solution ...

So in such opened free sections, WHERE ANIMAL EXPERTS SHOULD SAY WHERE EXACTLY TO KEEP THEM OPENED! police should remain there and stop people abusing of such opening (in case we know a lot of people illegally migrate via such openings ...).

The DHS has built eighteen segments of noncontiguous fencing in Hidalgo and Cameron counties. As shown in figure 2, some walls start only to end abruptly a few meters away. Neither DHS nor the Border Patrol has offered concrete information about the criteria used to determine the most effective locations for fencing in South Texas (Del Bosque, 2008).

Again, such opening need to be based on animal science! not randomly ...

So scientists / biologists need to tell the governments, where we need to keep that opened to reduce ecocide!

Within the entire U.S.-Mexico border region (including the eastern portion of the region outside the scope of this chapter), there are over 6,500 animal and plant species (EPA 2011). On the Mexican side, 235 species found in the border region are classified in a risk category. Of these, 85 are considered endangered under Mexico law. In the United States, 148 species found in border counties are listed as endangered under the U.S. Endangered Species Act (EPA 2011, 15).