A lone male wolf loped across the sandy landscape of the Chihuahuan Desert under a waning January moon in 2017, heading north. The male, known as M1425, was a member of a small population of endangered Mexican gray wolves reintroduced into Mexico in 2012.

The wolf was doing exactly what male wolves should be doing: exploring the landscape in search of new habitat, food sources and possibly even a mate. M1425 spent two nights exploring the new range before turning south and heading back to familiar territory.

The journey north, which took the wolf across the U.S.-Mexico border, was encouraging to researchers who tracked the animal’s peregrinations by GPS collar. Finding suitable mates has become a chief concern in the conservation of Mexican gray wolves, whose recovery has been stymied in part by lack of genetic diversity.
via Border wall poses new problems for the endangered Mexican Gray Wolf | The NM Political Report