Ceresa et al. share their experience investigating the conservation of peripheral populations, focusing on the critically endangered barred warbler Curruca nisoria in the Italian Alps. Peripheral populations — those living at the edges of a species’ distribution — are often small and isolated. Yet they can be disproportionately important for conservation, harbouring unique genetic diversity and local adaptations that may help species cope with environmental change. … Continue reading Studying habitat requirements at the edge of a species’ range: lessons from a critically endangered warbler in the Italian Alps