And this part of the San Rafael Valley has not traditionally been a frequent crossing site, according to some area residents and conservation groups that monitor animal movement along the border with cameras.“In my mind, it’s a big show of force for nothing,” says Shore.A drone view shows a new section of the border wall that stands in Arizona’s San Rafael Valley on 22 September. Photograph: Cheney Orr/ReutersThe new wall will replace low barriers meant to stop vehicles but which still allow wildlife to get across. Photograph: Lourdes Medrano/The GuardianThe San Rafael Valley spreads out between the Madrean Sky Islands that span both sides of the border.