Celastrina argiolus (Linnaeus, 1758)

Celastrina argiolus: Male [M] Celastrina argiolus: Female [N] Celastrina argiolus: Female [S] Celastrina argiolus: Adult (Olympus, Greece, July 2010) [N] Celastrina argiolus: Ovae at Lythrum [S] Celastrina argiolus: Half-grown larva [S] Celastrina argiolus: Larva [S] Celastrina argiolus: Pupa [S]

Host plants:
The larvae feed on flowering shrubs and perennials. More important are Frangula alnus, Calluna, Lythrum and some Fabaceae.

Celastrina argiolus occurs in shrub-rich areas from woodland edges, riparian forests, clearings up to gardens (frequent egg-laying at Lythrum around a garden pond near Memmingen/Germany). Usually the adults are observed more singly but widespread because they are little sedentary. In the Alps, Celastrina argiolus is restricted to the valleys. In Northern Greece I met sometimes higher abundances of butterflies feeding on Sambucus ebulus and Mentha sp. (e.g. Olympus, 800m asl, July 2012)

Life cycle:
There are most often two generations from April to June and again from mid-July to early September. Celastrina argiolus overwinters as a pupa.

Endangerment factors:
Dark forest management and the uniformization of the landscape is harmful for Celastrina argiolus even if it is still widespread and has low requirements concerning habitat quality.

Celastrina argiolus shows an holarctic distribution pattern and occurs in most of Europe (misses only in the extreme north), in North Africa, parts of Asia and North America.