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Butterfly taxonomy (classification) The skippers The swallowtails The whites The hairstreaks, coppers and blues. Includes the Duke of Burgundy. The nymphalids, fritillaries and browns. Includes the Monarch.
Mazarine Blue - imago - Bunderitsa Hut, Pirin, Bulgaria - 03-Jul-07 (1014)
Wingspan
Male: 32 - 36mm
Female: 34 - 38mm
Photo © Pete Eeles
Mazarine Blue

Cyaniris semiargus
sy-an-EYE-riss
se-mee-AH-guss
Number: 61.017
B&F No.: 1578
Family:Lycaenidae (Leach, 1815)
Subfamily:Polyommatinae (Swainson, 1827)
Tribe:Polyommatini (Swainson, 1827)
Genus:Cyaniris (Dalman, 1816)
Subgenus: 
Species:semiargus (Rottemburg, 1775)
Extinct
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  Introduction  

Despite being widespread and fairly common on the continent, this butterfly is extinct in the British Isles. It was found in the southern half of England - although those found on the coast are assumed to be immigrants and those found inland are considered to be either accidental or deliberate introductions.

This species was first mentioned as British in 1710 and there are several hundred sightings recorded up until the late 19th century. Various dates are given for the last sighting, although all are linked with a particular region. The end of the 19th century seems to mark a watershed, after which there are very few records. This species is extinct in the British Isles. One possible cause of the extinction is changes to haymaking which resulted in clovers being inadvertently cut while this species was still in its immature stages.

Cyaniris semiargus

This species was first defined in Rottemburg (1775) as shown here (type locality: Germany).


Mazarine Blue - imago - Bunderitsa Hut, Pirin, Bulgaria - 03-Jul-07 (1015)
Male
Photo © Pete Eeles
Mazarine Blue underside, Parc du Mercantour, Alpes-Maritimes, France, 8th July 2014
Male Underside
Photo © David M
Mazerine Blue,female - Aggletek - Hungary - 17-June-09
Female
Photo © Denise
Mazarine Blue - imago - Switzerland - Jun-06 (3) [Guy Padfield]
Female Underside
Photo © Guy Padfield

  Phenology  

There was one brood each year in the British Isles, with adults flying from mid-June through to mid-July.


  Habitat  

On the continent, this species can be one of the commonest species seen - and one that will turn up in any flowery meadow in southern and eastern Europe. It can also be found at both low and high altitude - up to 2000m. In all locations, it is considered to have one brood each year.

  Larval Foodplants  

The primary larval foodplant is Red Clover (Trifolium pratense).

  Nectar Sources  

Description to be completed

  Imago  

It is believed that this species formed discrete colonies in the British Isles, as it does on the continent.


Mazerine Blue,female - Aggletek - Hungary - 17-June-09
Photo © Denise
Mazarine Blue, male - Aggletek - Hungary - 17-June-09
Photo © Denise
Mazarine Blue mating
Photo © traplican
Mazarine Blue - imago - Bunderitsa Hut, Pirin, Bulgaria - 03-Jul-07 (1011)
Photo © Pete Eeles
03-Jul-2007
Mazarine Blue - imago - Bunderitsa Hut, Pirin, Bulgaria - 03-Jul-07 (1014)
Photo © Pete Eeles
03-Jul-2007
Mazarine Blue - imago - Bunderitsa Hut, Pirin, Bulgaria - 03-Jul-07 (1015)
Photo © Pete Eeles
03-Jul-2007
Mazarine Blue - imago - Bunderitsa Hut, Pirin, Bulgaria - 03-Jul-07 (1016)
Photo © Pete Eeles
03-Jul-2007
Mazarine Blue - imago - Bunderitsa Hut, Pirin, Bulgaria - 03-Jul-07 (1017)
Photo © Pete Eeles
03-Jul-2007
Mazarine Blue - imago - Castelluccio, Italy - 18-Jun-08 (2)
Photo © Pete Eeles
18-Jun-2008
Mazarine Blue - imago - Castelluccio, Italy - 18-Jun-08 (4)
Photo © Pete Eeles
18-Jun-2008
Mazarine Blue - imago - Gola del Infernaccio, Monti Sibillini, Italy - 16-Jun-08 (1)
Photo © Pete Eeles
16-Jun-2008
Mazarine Blue - imago - Bukk Hills, Hungary - 05-Jun-05 [Tim Norriss]
Photo © Tim Norriss
Mazarine Blue - imago - Gola del Infernaccio, Monti Sibillini, Italy - 16-Jun-08 (2)
Photo © Pete Eeles
16-Jun-2008
Mazarine Blue - imago - Monti Sibillini, Italy - 15-Jun-08 (3)
Photo © Pete Eeles
15-Jun-2008
Mazarine Blue - imago - Switzerland - Jul-05 [Guy Padfield]
Photo © Guy Padfield
Mazarine Blue - imago - Switzerland - Jun-06 (3) [Guy Padfield]
Photo © Guy Padfield
Mazarine Blue - imago - Switzerland - Jun-06 [Guy Padfield]
Photo © Guy Padfield
Mazarine Blue - imago - Dolomites, Italy - 01-Jul-08 [Jules Cross]
Photo © Jules Cross
01-Jul-2008
C. semiargus (female) SE Moravia (CZE) Jun 13 2009
Photo © traplican
Mazarine Blue (female) Cantabria N Spain 2010
Photo © johnb
26-Jun-2010
Mazarine Blue underside, Parc du Mercantour, Alpes-Maritimes, France, 8th July 2014
Photo © David M
Mazarine Blue, Parc du Mercantour, Alpes-Maritimes, France, 8th July 2014
Photo © David M
Mazarine Blue - Nr. Le Lac Bleu - Meribel - France - 20/07/14
Photo © William
20-Jul-2014

  Aberrations  

Description to be completed.

Unclassified Aberrations


Aberrant mazarine blue, Switzerland, June 2011
Photo © Padfield
Both sides similarly marked.

  Ovum  

Eggs are typically laid singly, deep in the flower heads of Red Clover. They resemble miniature sea urchins and are a pure white. The egg hatches after 1 or 2 weeks.


Mazarine Blue - ovum - Castelluccio, Italy - 18-Jun-08 (3)
Photo © Pete Eeles
23-Jun-2008
Mazarine Blue - ovum - Simplon Pass, Simplon, Switzerland - 12-Jul-11
Photo © Pete Eeles
Mazarine Blue - ovum - Simplon Pass, Simplon, Switzerland - 12-Jul-11-1
Photo © Pete Eeles

  Larva  

On emerging from the egg, the larva proceeds to feed within the flower heads of the foodplant. This species overwinters while still a young larva. The larva resumes feeding on shoots of clover the following spring.

  Pupa  

This stage lasts approximately 3 weeks.

  Similar Species  

No similar species found.

  Videos  

No videos are currently available for this species.

  Sites  

No sites found.

  Conservation Status  

No conservation action is relevant for this species.

  Links  

The following links provide additional information on this butterfly.

  References  

The species description provided here references the following publications:

ReferenceDetails
Rottemburg (1775) von Rottemburg, S.A.: Der Naturforscher. 1775.

  Copyright © Peter Eeles 2002-2014
All rights are reserved
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