Ecology, conservation and threats of Maculinea nausithous. Species page, life cycle and photos. PDF | Maculinea nausithous (Bergsträsser, ) was recently discovered in two parts of the Tran-sylvanian basin. External characters of these populations. Maculinea nausithous Bergstrasser, Dusky Large Blue, Dunkle Wiesenknopf-Ameisenbläuling, Azuré des paluds, Голубянка навзитой, Մթնշաղային.
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This species is so dusky, it looks rather like one of the heaths, Coenonympha. The very dark blue of the male upperside is quickly apparent after brief observation however.
Dusky large blue
No other species are similar, even amongst the other large blues, Maculinea. Lacks any submarginal markings on the underside hindwing.
One or two small areas of northwest Spain with the main distribution from central eastern France, Switzerland, Germany absent from the north and eastwards. Flight time seems to vary with locality and altitude.
In north Spain I have found it in very good condition in mid August at about m and 8 years later at the same site in mid July in good condition.
Phengaris nausithous on euroButterflies by Matt Rowlings
Marshland, which may maculiena fairly dry in the summer where the larval food plant great burnet, Sanguisorba officinalisgrows. Adults will often sit head down on the flower heads of Sanguisorba where they are surprisingly inconspicuous.
In this position they often curve their abdonmen around the flower head. In the heat of the summer in Spain they will rest like this for a considerable amount of time unless disturbed when, in the afternoon of a very hot day, they will walk round the flower head rather than fly.
A male telejus is trying to mate with a female nausithous. She’s not interested at all. Phengaris nausithous Dusky Large Blue. Vaud, Switzerland, June Field notes and information This species is so dusky, it looks rather like one of the heaths, Coenonympha.
Vaud, Switzerland, June Egg laying and eggs in the head of the food plant Sanguisorb. Soria, Spain, July Fribourg, Swizterland, June Vaud, Switzerland, July Vaud, Switzerland, June Egg laying. Vaud, Switzerland, June A male telejus is trying to mate with a female nausithous.