The rare Marsh Fritillary butterfly has had an excellent year in Northern Ireland, thanks to warm weather and years of targeted conservation work. Once widespread, the species declined sharply as farming practices changed and its key food plant, Devil’s-bit Scabious, became scarce.
Butterfly Conservation has been working with farmers to restore and manage suitable grassland habitats. Recent surveys show dramatic increases in caterpillar nests: one site rose from 24 to 53, another from 24 to 139, and a third from five to 27.
Conservation manager Rose Cremin said the results proved that proper habitat management—not just favourable weather—is essential for long-term recovery. Because the species produces only one brood per year, it is especially vulnerable to habitat loss.
Despite decades of decline, this year’s surge shows that dedicated conservation and cooperation with landowners can significantly improve butterfly populations.
