Butterflies around the world are changing habitats – and experts say it’s ‘signalling a warning’

New research shows early-warning species is on the move, expanding or contracting geographic range and changing altitudeButterflies, often considered a “sentinel of change”, are on the move across every continent they inhabit, shifting to survive as global heating reshapes their environment. About one in 10 species have already expanded or contracted their geographic range, or shifted in altitude, according to a global study published in Nature Ecology & Evolution.