Polyommatus eros

Eros Blue

euroButterflies

by Matt Rowlings

copyright © 2003-2016

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Photo: eros

Vaud, Switzerland, June 2007

Photo: eros

Valais, Switzerland, July 2006

Field notes and information

This is an alpine species with spectaulcar bright blue uppersides in the male.

Identification & Similar species: Superficially similar to the common blue, P. icarus, the bright upperside blue and broad black border are distinctive. Similar taxa from the Balkans have recently been reclassed as subspecies of the present species. They are the false eros and Taygetos blues, P. eroides & P. menelaos. See separate pages for these two taxa.

Distribution & Flight: Restricted to the Alps and the Pyrenees, central Italy and a few spots in the north western Balkans. Usually at alpine levels, but may be lower.

Habitat & Behaviour: Open grassy flowery places. Males frequently take salt, sometimes as part of large multi-species congregations. Females are discrete and much harder to find.

Photo: eros

Vaud, Switzerland, June 2011

Photo: erosPhoto: eros

Valais, Switzerland, July 2015

Photo: eros

Valais, Switzerland, July 2015

P. eros, P. idas, C. semiargus.

Photo: eros

Valais, Switzerland, July 2015

Photo: erosPhoto: eros

Hautes Alpes, France, July 2013

Photo: erosPhoto: eros

Grisons, Switzerland, July 2013

Photo: eros

Vaud, Switzerland, June 2011

Photo: eros

Bern, Switzerland, August 2012

Photo: erosPhoto: eros

Valais, Switzerland, July 2015

Photo: erosPhoto: eros

Valais, Switzerland, July 2015

Photo: erosPhoto: erosPhoto: eros

Valais, Switzerland, July 2009

Female egg laying.

Photo: erosPhoto: erosPhoto: eros

Valais, Switzerland, July 2006