Common Blue Male Common Blue

Adult:                                       June-Sept

Caterpillar Food-plant:   Bird's-foot Trefoil

Wingspan:                                       32mm
COMMON BLUE

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Adult: The Common Blue is the most widespread blue butterfly in Britain and is found in a variety of grassy habitats. The brightly coloured males are conspicuous with their bright blue upper wings, but females are more secretive. The colour of the upperwings of females varies from almost completely brown in southern England to predominantly blue in western Ireland and Scotland. This species is found in a wide variety of habitats, including unimproved grassland such as roadside verges and waste ground, down-land, woodland clearings, heath-land and even sand dunes.

Caterpillar: On emerging from the egg the caterpillar moves underneath a leaf. As it grows, it feeds on the leaves from all over the food-plant Bird's-foot Trefoil. Some caterpillars will hibernate in leaf litter at the base of the plant. Like many other species of blue, the larva is attractive to ants, although only when fully grown. The fully-grown larva is approximately 13mm in length.

Where to See: Not as common on Mull as the name suggests but can be seen, where the food-plant grows, mainly on the drier areas of the shore

Polyommatus icarus

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