Special features: The Small Blue butterfly is the smallest butterfly in the UK. The upper surfaces of the wings are a dark smoky-brown colour. The males usually have a tinge of blue scales where the wings meet the body (but not always).
The undersides of the wings (males and females) are a dusty brown colour with dark spots. There are no orange spots. Where the wings meet the body there is a flush of blue scales.
The little white caterpillars are less than 10mm long and feed on kidney vetch (Anthyllis vulneraria).
Latin name: Cupido minimus
Size: Wingspan approximately 23mm.
Distribution: Rare. Scattered populations found throughout the UK in small numbers.
Months seen: May to early July. Sometimes a second generation appears in August.
Habitat: Sheltered, sunny meadows, downs, and fields. Usually in chalk or limestone areas where its food plant grows.
Food: Nectar. Caterpillars feed on kidney vetch.