{"id":168,"date":"2025-08-10T14:51:42","date_gmt":"2025-08-10T14:51:42","guid":{"rendered":"https:\/\/macrostock.eu\/?p=168"},"modified":"2025-08-10T14:51:42","modified_gmt":"2025-08-10T14:51:42","slug":"mazarine-blue-cyaniris-semiargus","status":"publish","type":"post","link":"https:\/\/macrostock.karits.eu\/index.php\/2025\/08\/10\/mazarine-blue-cyaniris-semiargus\/","title":{"rendered":"Mazarine Blue (Cyaniris semiargus)"},"content":{"rendered":"\n
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Download image<\/a><\/div>\n<\/div>\n\n\n\n

\ud83e\udd8b Mazarine Blue (Cyaniris semiargus<\/em>) \u2013 Overview<\/h3>\n\n\n\n

The Mazarine Blue<\/strong> is a charming butterfly in the Lycaenidae<\/strong> family (blues), known for the deep violet-blue coloration<\/strong> of its males and a subtle elegance<\/strong> in both sexes. Once widespread across Europe and temperate Asia<\/strong>, it has declined in parts of its range due to habitat loss, but it remains locally common in flower-rich meadows and pastures.<\/p>\n\n\n\n

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\ud83d\udd0d Identification<\/strong><\/h3>\n\n\n\n
Feature<\/th>Male<\/th>Female<\/th><\/tr><\/thead>
Wingspan<\/strong><\/td>28\u201334 mm<\/td>Same<\/td><\/tr>
Upperside<\/strong><\/td>Uniform deep blue<\/strong> with narrow black margin, no orange or white markings<\/strong><\/td>Dark brown<\/strong>, sometimes with faint bluish shading<\/td><\/tr>
Underside<\/strong><\/td>Pale grey with small black dots<\/strong> and no orange<\/strong><\/td>Similar to male<\/td><\/tr>
Fringes<\/strong><\/td>White, clearly visible<\/td>Same<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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Unlike many other \u201cblues,\u201d C. semiargus<\/em> has no orange markings<\/strong> (lunules) on the underside, making it easier to distinguish from species like the Common Blue<\/strong> (Polyommatus icarus<\/em>).<\/p>\n<\/blockquote>\n\n\n\n

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\ud83c\udf3f Habitat<\/strong><\/h3>\n\n\n\n
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  • Prefers:\n
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    • Flower-rich meadows<\/strong><\/li>\n\n\n\n
    • Alpine pastures<\/strong><\/li>\n\n\n\n
    • Woodland clearings<\/strong><\/li>\n\n\n\n
    • Calcareous grasslands<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • Typically found between lowland valleys to montane regions<\/strong> (up to 2,000 m in southern Europe).<\/li>\n<\/ul>\n\n\n\n
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      \ud83d\udc1b Host Plants (Larval Food)<\/strong><\/h3>\n\n\n\n

      Caterpillars primarily feed on clover species<\/strong>, especially:<\/p>\n\n\n\n

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      • Trifolium pratense<\/em> (Red Clover)<\/li>\n\n\n\n
      • Trifolium repens<\/em> (White Clover)<\/li>\n\n\n\n
      • Occasionally other Fabaceae<\/strong> (legumes)<\/li>\n<\/ul>\n\n\n\n
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        \ud83d\udd01 Life Cycle<\/strong><\/h3>\n\n\n\n
        Stage<\/th>Timing (Europe, varies by region)<\/th><\/tr><\/thead>
        Egg<\/strong><\/td>Laid singly on host plant leaves or flowers<\/td><\/tr>
        Larva<\/strong><\/td>Pale green, slug-like, blends in with foliage<\/td><\/tr>
        Pupa<\/strong><\/td>Formed on the ground or low vegetation<\/td><\/tr>
        Adult<\/strong><\/td>May to July (1 generation per year)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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        • Some populations in warmer climates may have a partial second generation<\/strong>.<\/li>\n\n\n\n
        • Larvae sometimes tended by ants<\/strong> for protection in a mild myrmecophilous relationship<\/strong>.<\/li>\n<\/ul>\n\n\n\n
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          \ud83e\udde0 Interesting Facts<\/strong><\/h3>\n\n\n\n
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          • Named after the deep blue<\/strong> pigment once used to dye Mazarine cloaks<\/strong> worn by Cardinal Mazarin.<\/li>\n\n\n\n
          • Males often bask with wings open, while females are more secretive and rest with wings closed.<\/li>\n\n\n\n
          • Sensitive to agricultural intensification<\/strong> and meadow drainage<\/strong>; a key bioindicator of traditional hay meadow health<\/strong>.<\/li>\n<\/ul>\n\n\n\n
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            \ud83c\udf0d Distribution<\/strong><\/h3>\n\n\n\n
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            • Found throughout:\n
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              • Most of Europe<\/strong> (but rare or extinct in some western\/northern areas like the UK and parts of Scandinavia)<\/li>\n\n\n\n
              • Central Asia<\/strong><\/li>\n\n\n\n
              • Russia and Siberia<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n
              • Declining in western Europe due to habitat fragmentation.<\/li>\n<\/ul>\n\n\n\n
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