Adonis Blue
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Lysandra bellargus
Common throughout Southern England.
The Caterpillar reaches 1.6 centimetres (0.63 in) in length, has a dark green body with dark spines, and yellow bands along the back and sides.
The Larvae also feeds on Horseshoe Vetch.
Males have the upper side wings a brilliant sky blue, with a fine black line round the edge and a white margin.
Females are chocolate brown with a few blue scales near the base, and with orange spots, bordered by blue scales, around the edge of the hind wing.
The fringes are chequered both sexes.
The underside is brownish grey with black and orange crescent spots.
Flight period is May & June, also August-September.