Pearl-bordered Fritillary Boloria euphrosyne (Linnaeus 1758)
Family: Nymphalidae, subgroup Heliconiinae
Photo above top left by D O'Brien (also header photo)
Photo above top right by RD Burton
Photo above middle by Samantha Batty
The Pearl-bordered Fritillary is the first of Yorkshire’s four Fritillary species to emerge and normally does so mid-late April. The species is medium sized; its upper wings bear orange and black patterns of dots and ribbons while its underside bears two large silver “pearls”. These, along with seven outer “pearls” with their adjacent reddish chevrons, help to distinguish it from its later flying congener, the Small Pearl-bordered Fritillary (Boloria selene). The flight periods of these species do overlap and both species co-exist on at least one of Yorkshire’s sites meaning identification may be problematic.
Dave Wainwright 18/03/2021