- National Status: Scattered colonies throughout England and Wales. Suffered major range contraction with Dutch Elm disease. Population trend 10 years -77%; since 1976 -96%.
- West Midlands Status: Isolated colonies throughout the region with the greatest concentration in north-west Staffordshire. Range contracting. Population trend 10 years – decreasing but under-recorded
- Hotspots: Upton Warren in Worcestershire, Stafford Castle. Baggeridge Country Park, Haugh Wood, North Hill Malvern, Woodgate Valley.
- Habitat: Elm trees Ulmus spp. in all suitable habitats, such as woodland edges, hedges and even solitary large elms in gardens. Elms, with an open, sunny, southern aspect are preferred.
- Flight Period: Late June to mid-August.
- Wingspan 25–35 mm.
Caterpillar Food Plant – Elms
Life Cycle:
- The Charts show the distribution over the last 5 years 2020 to 2025
- The Population Trend from Transect Records – 2020 to 2025 (No Transect Records 2024/25)
- Phenology from Transect Records
Detailed Site Mapping from Google 2019
Detailed Site Mapping from Google 2020
Detailed Site Mapping from Google 2021
Detailed Site Mapping from Google 2022
Detailed Site Mapping from Google 2023
West Midlands Butterflies Blog 