Blue Tiger

Fascinating facts about the Blue Tiger

• During the monsoon season the blue tiger undertakes extensive migrations across southern India, moving in large, gregarious swarms. Observers have noted that these travelling groups are composed almost entirely of males, a striking sex bias in the migrating population. While on the move the butterflies also engage in mud-puddling, gathering minerals from wet ground to supplement their diet.
• The blue tiger is native to South and Southeast Asia, where it is commonly found across a wide tropical range. In 2019 a single adult was recorded on the Balearic Islands, marking the first time the species had been documented in Europe. That lone sighting therefore extended the known distribution of the butterfly beyond its Asian heartland for the first time.
• Newly hatched blue tiger caterpillars are tiny, measuring about 1.21 cm and weighing roughly 5 mg at emergence. Within just 48 hours they double in length and quadruple their weight, a rapid growth supported by feeding on a variety of milkweed-family plants such as Asclepias, Calotropis and Crotalaria. These host plants provide the nutrients needed for the larvae to reach the size required for pupation.
• Male blue tigers carry a specialised black pocket on the hind-wing that holds scented scales for courtship displays. These pockets are only formed after the butterfly hatches, when it inflates its wings and turns up the scented flakes. The scented scales, together with tufts of hair that can be fanned from the abdomen, are used during mating rituals. The hair tufts arise mainly from the rear third of the abdominal tuft, a trait typical of Danaini butterflies.
• The iridescent blue spots on the blue tiger's wings are coloured by the pigment pterobilin. The wing surface combines both light and dark areas, allowing the dark patches to absorb solar heat and enable autonomous flight. Experiments have shown that exposure to high-intensity light markedly boosts the butterfly's flight activity. Thus the pigment and wing colouration together support the species' thermoregulatory and flight behaviour.

Sources

Every fact above was checked against these pages, and kept only where one of them states it.

• Wikipedia

At a glance

About the Blue Tiger

In the lush, vibrant landscapes of its native habitat, the Blue Tiger butterfly dances on iridescent wings, its ethereal beauty leaving a trail of wonder in its wake. As it flutters effortlessly through the underbrush, the warm sunlight catches its delicate scales, casting a mesmerizing glow that seems almost otherworldly. With each gentle beat of its wings, this enchanting creature weaves a subtle spell of enchantment, its very presence a reminder of the magic that still awaits discovery in the uncharted corners of our natural world.

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