''Polyommatus amandus'', the Amanda's blue, is a

butterfly Butterflies are insects in the macrolepidopteran clade Rhopalocera from the Order (biology), order Lepidoptera, which also includes moths. Adult butterflies have large, often brightly coloured wings, and conspicuous, fluttering flight. The ...

of the family

Lycaenidae Lycaenidae is the second-largest family of butterflies (behind Nymphalidae, brush-footed butterflies), with over 6,000 species worldwide, whose members are also called gossamer-winged butterflies. They constitute about 30% of the known butterfl ...

. It is found in the

Palearctic realm The Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa. The realm consists of several bioregions: the Euro-Sibe ...

Description

With a wingspan of , Amanda's blue is noticeably larger than most of the "blue" butterflies, which is particularly apparent when they are flying. The upperside of the male's wings is a silvery blue or sky blue, often, but not always, with a broad dark border and a narrow black marginal line with an outermost white line. The upperside of the female's wings is in some populations dark blue edged with brown but in other populations is medium brown with a row of orange half-moon shaped lunules near the edges. The hind margin has red blotches. The underside of the male's wings are light grey with white-edged black blotches. The underside of the female's wings is similar but they are a rich creamy-brown colour with red blotches, especially on the margins of the hindwings and a series of black spots with white rims, often touching, forming a row parallel to the margin of the wings. The basal areas of the underwings are turquoise. The

wingspan The wingspan (or just span) of a bird or an airplane is the distance from one wingtip to the other wingtip. For example, the Boeing 777–200 has a wingspan of , and a wandering albatross (''Diomedea exulans'') caught in 1965 had a wingspan of ...

is .

Distribution and habitat

Amanda's blue is native to much of central and northern Europe. Its habitat is meadows, heaths, grassland, roadsides and other open areas and places where the larval food plants grow and usually at altitudes of at least .

Life cycle

This butterfly flies from May to August. The larvae feed on species of vetch, often

meadow vetchling ''Lathyrus pratensis'' or meadow vetchling, yellow pea, meadow pea and meadow pea-vine, is a perennial legume that grows to 1.2 m in height. The hermaphrodite flowers are pollinated by bees. As a perennial, this plant reproduces itself over man ...

(''Lathyrus pratensis'') and

tufted vetch ''Vicia cracca'' (tufted vetch, cow vetch, bird vetch, blue vetch, boreal vetch), is a species of flowering plant in the pea and bean family Fabaceae. It is native to Europe and Asia. It occurs on other continents as an introduced species, includ ...

(''Vicia cracca''). The males fly around near the host plants waiting for females to arrive. The females lay their eggs singly on the leaves of the host plant. The caterpillars have glands which secrete a sugary fluid that attracts ants and the presence of these protects the larvae from

predators Predation is a biological interaction where one organism, the predator, kills and eats another organism, its prey. It is one of a family of common feeding behaviours that includes parasitism and micropredation (which usually do not kill the ...

References

{{Taxonbar, from=Q1316205 Polyommatus Butterflies described in 1792 Butterflies of Europe