Butterflies on the Brink: Mountain Biodiversity Faces Warming Threats

Butterflies, long admired for their beauty, are also vital indicators of ecological well-being. A recent global study by Pinkert et al. (2025) offers the most extensive assessment to date of butterfly biodiversity and uncovers a troubling reality: the greatest concentrations of butterfly diversity are found in tropical and subtropical mountain regions—ecosystems now particularly vulnerable to the impacts of climate change.