Boloria aquilonaris

Cranberry Fritillary

euroButterflies

by Matt Rowlings

copyright © 2003-2016

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Photo: aquilonaris

Vaud, Switzerland, July 2012

Photo: aquilonaris

Vaud, Switzerland, July 2012

Field notes and information

A species of bogs in hilly areas from the northern Alps to Scandinavia and eastwards. Isolated colonies in France. It is an apparently localised butterfly in central Europe and the Alps (at least in my experience) but can be very common where it flies. It flies more commonly in suitable habitats across Scandinavia

Identification & Similar species: One of a group of 4 very similar species. Differences as follows:

Shepherd's fritillary, pales: northwest Spain, Pyrenees, Alps, east Europe, Balkans. Underside forewing lacking black spots. Broad upperside forewing lines. Relatively small.

Mountain fritillary, napaea: Pyrenees, Alps, Scandinavia. Underside forewing lacking black spots. Fine upperside forewing lines. Relatively large. Females often with dark dusky purple sheen.

Cranberry fritillary, aquilonaris: northern Alps to Scandinavia and eastwards. Underside forewing with black spots.

Balkan fritillary, graeca: southern Alps (France), Balkans. Underside forewing with black spots.

Flight: Single brooded in June and July.

Habitat & Behaviour: Flowery bogs in hilly areas. Flies low and unhurredly from flower to flower above the bog.

Photo: aquilonaris

Vaud, Switzerland, July 2012

Photo: aquilonaris

Vaud, Switzerland, July 2006

The strong black spots on the underside forewing are clearly visible - closely related species also flying in Switzerland have weak shadowy spots (B. napeae, B. pales).

Photo: aquilonaris

Vaud, Switzerland, July 2006

Photo: aquilonarisPhoto: aquilonaris

NW Finland, June 2010

Photo: aquilonaris

Vaud, Switzerland, July 2006

Photo: aquilonaris

Vaud, Switzerland, July 2007

Can be common where found - about 10 butterflies visible in this photo roosting in late evening.

Photo: aquilonaris

Vaud, Switzerland, July 2012

Photo: aquilonaris

Vaud, Switzerland, June 2011

Photo: aquilonaris

Vaud, Switzerland, June 2011

Photo: aquilonaris

Vaud, Switzerland, July 2012

Photo: aquilonarisPhoto: aquilonaris

Vaud, Switzerland, June 2011

Photo: aquilonarisPhoto: aquilonarisPhoto: aquilonaris

Vaud, Switzerland, July 2012