| Family | Lycaenidae |
|---|---|
| Subfamily | Theclinae |
| Genus | Satyrium |
| Species | spini |
| Authority | ([Denis & Schiffermüller], 1775) |
| English Name | Blue-spot Hairstreak |
| European Red List 2010 | Least Concern (LC) |
|---|---|
| EU 27 Red List 2010 | Least Concern (LC) |
| European Red List 2025 | Vulnerable (VU) |
| EU 27 Red List 2025 | Vulnerable (VU) |
| Habitats Directive | |
| Bern Convention | |
| CITES |
The Blue-spot Hairstreak can be found in sunny, warm places, on groups of bushes, or on scrub at the edge of a wood, with some flowering vegetation as nectar source nearby. The female lays her eggs on various buckthorns (Rhamnus spp.), choosing branches situated in the sun. The small caterpillar only emerges in the spring, having passed the winter in the eggshell. It wastes no time in beginning to eat buds and young leaves. Ants of the genera Lasius and Formica may visit the caterpillar. When fully-grown, it pupates on the foodplant, the pupa suspended by a silken girdle. The Blue-spot Hairstreak has one generation a year.
Albania / Andorra / Austria / Belarus / Belgium / Belgium: Wallonia / Bosnia and Herzegovina / Bulgaria / Croatia / Czechia / France / France: Mainland / Germany / Greece / Greece: Mainland / Greece: East Aegean Islands / Hungary / Italy / Italy: Mainland / Lithuania / Luxembourg (Regionally Extinct) / North Macedonia / Moldova / Montenegro / Poland / Portugal / Portugal: Mainland / Romania / European Russia / Serbia / Serbia: Serbia / Serbia: Kosovo / Slovakia / Slovenia / Spain / Spain: Mainland / Switzerland / European Türkiye / Ukraine / United Kingdom: Gibraltar /