| Family | Lycaenidae |
|---|---|
| Subfamily | Polyommatinae |
| Genus | Polyommatus |
| Species | damon |
| Authority | ([Denis & Schiffermüller], 1775) |
| English Name | Damon Blue |
| European Red List 2010 | Near Threatened (NT) |
|---|---|
| EU 27 Red List 2010 | Near Threatened (NT) |
| European Red List 2025 | Least Concern (LC) |
| EU 27 Red List 2025 | Least Concern (LC) |
| Habitats Directive | |
| Bern Convention | |
| CITES |
The Damon Blue is found on calcareous soil, on grasslands, rough vegetation, such as small patches at the edge of scrub or woodland, and also on abandoned Sainfoin (Onobrychis viciifolia) fields. It lays its eggs on different species of Onobrychis, including Sainfoin (Onobrychis viciifolia). The caterpillars seem to like being between the flowers and only start to feed late in the afternoon. They are often attended by ants of the genera Lasius or Formica. They pupate in the litter layer. The Damon Blue has one generation a year.
Albania / Andorra / Austria / Belgium (Irregular Vagrant) / Belgium: Flanders (Irregular Vagrant) / Bosnia and Herzegovina / Bulgaria / Croatia / Czechia / France / France: Mainland / Germany / Greece / Greece: Mainland / Hungary (Regionally Extinct) / Italy / Italy: Mainland / Latvia / Liechtenstein / North Macedonia / Montenegro / Poland (Regionally Extinct) / Romania (Regionally Extinct) / European Russia / Serbia / Serbia: Serbia / Serbia: Kosovo / Slovakia (Regionally Extinct) / Spain / Spain: Mainland / Switzerland / Ukraine (Possibly Present) /