Male jaguars have appeared near the US border in Mexico over five years. Recently, a female, Adela, was sighted, offering strong hope for the species' natural return to its former US habitat, nearly eighty years after the last US female was killed. However, the border wall, built since 2025, blocks three of four crucial wildlife corridors. This barrier significantly impedes the jaguars' ability to re-establish in Arizona. The author critically notes how human-made divisions hinder natural migration, echoing Robert Frost's sentiment against walls, particularly for wildlife. The situation emphasizes nature's resilience versus political obstacles.