The Lycaenidae include blues, coppers and hairstreaks – small, delicate butterflies with metallic colors. They inhabit flower-rich meadows, banks and path edges. Some are associated with specific host plants (clovers, brooms, brambles…), and several species have a symbiotic relationship with ants, which protect the caterpillars in exchange for sugary secretions. Their flight is quick and fluttery, but they often rest on flowers or warm stones. This discreet group includes many local species sensitive to habitat change.
5 April 2025 · 4 min · 773 words · Damien Théraulaz | Translations:
LYCAENIDAE – THE LYCAENIDS The Lycaenidae – The Lycaenids – are characterized by their small size and vivid colors. This family includes many species with often iridescent wings and delicate patterns. Lycaenids are known for their symbiotic relationships with ants, where the caterpillars secrete sweet substances to receive protection. Some species even use ant colonies as shelter or food sources.
Lycaenid caterpillars feed on a wide range of host plants. The Lycaenidae are widespread around the world and occupy a great variety of habitats, from forests and meadows to coastal zones.
Geranium Bronze (Cacyreus marshalli) on a white flowerGeranium Bronze (Cacyreus marshalli) on a white and purple flowerGeranium Bronze (Cacyreus marshalli) on a pink flower in a meadow
intense sky blue (male) / brown with orange lunules (female)
Min size
30
Max size
35
Region
Europe
Adonis Blue (Polyommatus bellargus, female) on a thistle flowerAdonis Blue (Polyommatus bellargus, female) close-up on a flowerAdonis Blue (Polyommatus bellargus, male) on a clover flowerAdonis Blue (Polyommatus bellargus, male) in a meadow on cloverAdonis Blue (Polyommatus bellargus, male) from above with open wings
