A rare butterfly previously declared extinct for three decades has been sighted in various locations across England. The Large Tortoiseshell, which had only sporadic sightings in the past 30 years, may no longer be classified as extinct, according to experts.
Recent photographs taken by nature enthusiasts in Kent, Hampshire, Sussex, Dorset, Cornwall, and the Isle of Wight have captured the elusive butterfly. While occasional sightings have occurred over the years, the frequency of sightings is on the rise.
The Head of Science at Butterfly Conservation mentioned that if the organization were to update its endangered species list, the Large Tortoiseshell would likely be removed from the extinct category. The butterfly, scientifically known as Nymphalis polychloros, boasts vibrant orange, black, and blue wings and was once abundant in England and Wales until the 1980s.
Historically, the population decline of the Large Tortoiseshell was linked to Dutch elm disease affecting elm trees, its primary egg-laying habitat. However, recent reports suggest a resurgence in the Netherlands, with potential migration to England. The butterfly emerges from hibernation during the first warm days of spring, explaining the recent surge in sightings.
Notably, Butterfly Conservation has added the Large Tortoiseshell to its First Sightings web page, recording initial sightings across the UK. The species was first spotted this year on the Isle of Wight on February 24, with subsequent sightings in Kent, Hampshire, and Sussex.
Although currently classified as “regionally extinct” on the GB Butterfly Red List, ongoing observations may prompt a reevaluation in the future. Experts anticipate reclassifying the Large Tortoiseshell as established in several parts of Britain, signaling a positive shift in its population status.
As the butterfly’s colonization continues, experts remain cautiously optimistic, noting the uncertainties associated with new species establishing themselves in different regions. The trajectory of the Large Tortoiseshell’s resurgence will be closely monitored in the coming years.
