The Department of Homeland Security (DHS) will soon get unsolicited advice from a group of U.S. government scientists that claim fencing along the Mexican border threatens the black bear population.

The esteemed researchers recently published a study warning that the border wall erected to protect the country from illegal immigration and drug smuggling is an obstacle that blocks bears in migration. This may threaten the black bear population in parts of Arizona, they say. The findings were published recently in a science research journal so it didn’t get much publicity until a mainstream newspaper picked it up this week.

The newspaper article goes into considerable detail about how the probe was conducted, mainly by using pieces of barbed wire to capture genetic samples of “foraging” bears.