{"id":157,"date":"2025-08-21T13:30:04","date_gmt":"2025-08-21T13:30:04","guid":{"rendered":"https:\/\/macrostock.eu\/?p=157"},"modified":"2025-08-21T13:30:04","modified_gmt":"2025-08-21T13:30:04","slug":"blue-glassy-tiger-ideopsis-similis","status":"publish","type":"post","link":"https:\/\/macrostock.karits.eu\/index.php\/2025\/08\/21\/blue-glassy-tiger-ideopsis-similis\/","title":{"rendered":"Blue glassy tiger (Ideopsis similis)"},"content":{"rendered":"\n
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Download full size image<\/a><\/div>\n<\/div>\n\n\n\n

\ud83e\udd8b Blue Glassy Tiger (Ideopsis similis<\/em>) \u2013 Overview<\/p>\n\n\n\n

The Blue Glassy Tiger<\/strong> is a graceful butterfly species in the Danainae<\/strong> subfamily (the same group as monarchs and common tigers). Known for its translucent blue-white patterned wings<\/strong>, it glides gently through forests, gardens, and coastal habitats in South and Southeast Asia<\/strong>, including Thailand<\/strong>, India<\/strong>, Sri Lanka<\/strong>, and Malaysia<\/strong>.<\/p>\n\n\n\n

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\ud83d\udd0d Identification<\/strong><\/h3>\n\n\n\n
Feature<\/th>Description<\/th><\/tr><\/thead>
Wingspan<\/strong><\/td>70\u201385 mm<\/td><\/tr>
Color<\/strong><\/td>Translucent pale blue<\/strong> wings with black veining and borders<\/strong><\/td><\/tr>
Body<\/strong><\/td>Black with white spots<\/td><\/tr>
Flight<\/strong><\/td>Slow, gliding, and graceful \u2013 typical of milkweed butterflies<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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Very similar to the Dark Glassy Tiger (Parantica agleoides<\/em>)<\/strong>, but I. similis<\/em> has a lighter blue tone<\/strong> and slightly longer wings<\/strong>.<\/p>\n<\/blockquote>\n\n\n\n

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\ud83c\udf3f Habitat<\/strong><\/h3>\n\n\n\n
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  • Commonly found in:\n
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    • Mangroves<\/strong><\/li>\n\n\n\n
    • Coastal scrub<\/strong><\/li>\n\n\n\n
    • Open woodlands<\/strong><\/li>\n\n\n\n
    • Gardens<\/strong> and parks<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • Typically prefers humid<\/strong>, lowland areas<\/strong> but can also be seen in hill forests<\/strong>.<\/li>\n<\/ul>\n\n\n\n
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      \ud83c\udf43 Host Plants (Larval Food)<\/strong><\/h3>\n\n\n\n

      The caterpillars feed on toxic plants<\/strong>, particularly from the Apocynaceae<\/strong> and Asclepiadaceae<\/strong> (milkweed) families, such as:<\/p>\n\n\n\n

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      • Tylophora indica<\/em><\/li>\n\n\n\n
      • Marsdenia tinctoria<\/em><\/li>\n<\/ul>\n\n\n\n
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        These host plants make both larvae and adults unpalatable to predators<\/strong> due to sequestered toxins<\/strong>.<\/p>\n<\/blockquote>\n\n\n\n

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        \ud83d\udc1b Life Cycle<\/strong><\/h3>\n\n\n\n
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        1. Eggs<\/strong> laid singly on host plants.<\/li>\n\n\n\n
        2. Caterpillars<\/strong>: Black with white and yellow bands, with fleshy filaments (like other Danainae).<\/li>\n\n\n\n
        3. Pupa<\/strong>: Shiny green with golden spots.<\/li>\n\n\n\n
        4. Adults<\/strong> emerge after about a week and can live several weeks.<\/li>\n<\/ol>\n\n\n\n
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          \ud83e\udde0 Behavior & Ecology<\/strong><\/h3>\n\n\n\n
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          • Feeds on nectar<\/strong> from flowers like Lantana<\/em>, Asystasia<\/em>, and Clerodendrum<\/em>.<\/li>\n\n\n\n
          • Participates in mimicry complexes<\/strong> with other milkweed butterflies (e.g., Tirumala<\/em> and Danaus<\/em> species).<\/li>\n\n\n\n
          • Unpalatable to birds<\/strong>, and often seen in butterfly congregations<\/strong> at forest edges or puddles (puddling behavior).<\/li>\n<\/ul>\n\n\n\n
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            \ud83c\udf0f Distribution<\/strong><\/h3>\n\n\n\n

            Widespread in:<\/p>\n\n\n\n

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            • India<\/strong><\/li>\n\n\n\n
            • Sri Lanka<\/strong><\/li>\n\n\n\n
            • Nepal<\/strong><\/li>\n\n\n\n
            • Thailand<\/strong><\/li>\n\n\n\n
            • Malaysia<\/strong><\/li>\n\n\n\n
            • Indonesia<\/strong><\/li>\n\n\n\n
            • Parts of southern China<\/strong> and Taiwan<\/strong><\/li>\n<\/ul>\n\n\n\n
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              \ud83e\uddec Interesting Facts<\/strong><\/h3>\n\n\n\n
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              • Adults can absorb pyrrolizidine alkaloids<\/strong> from certain plants or decaying material, used for chemical defense<\/strong> and pheromone production<\/strong>.<\/li>\n\n\n\n
              • Often mimicked by palatable butterflies<\/strong> for protection \u2014 classic example of M\u00fcllerian mimicry<\/strong>.<\/li>\n<\/ul>\n\n\n\n
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                Would you like to see a comparison chart between Ideopsis similis<\/em> and other lookalikes like Parantica agleoides<\/em> or Tirumala limniace<\/em> (Blue Tiger)?<\/p>\n\n\n\n