Finding the corridor more traveled

As wildlands give way to an expanding human footprint, scientists and land managers have struggled to develop land conservation strategies that protect biodiversity. A favored strategy is to connect large habitat areas with landscape corridors (1–3). Yet, the scientific question remains: Do corridors actually work to promote dispersal and conserve biodiversity? In this issue of PNAS, Gillies and St. Clair's (4) answer this question with a clever behavioral experiment that offers new insights into the circumstances under which corridors benefit species.