| Family | Lycaenidae |
|---|---|
| Subfamily | Polyommatinae |
| Genus | Plebejus |
| Species | argyrognomon |
| Authority | (Bergsträsser, 1779) |
| English Name | Reverdin's Blue |
| European Red List 2010 | Least Concern (LC) |
|---|---|
| EU 27 Red List 2010 | Least Concern (LC) |
| European Red List 2025 | Least Concern (LC) |
| EU 27 Red List 2025 | Least Concern (LC) |
| Habitats Directive | |
| Bern Convention | |
| CITES |
Reverdin’s Blue can be found on poor grassland in places ranging from dry to moist at the edges of woodland or scrub. Eggs are laid on Crown Vetch (Coronilla varia) and Milk-vetch (Astragalus glycyphyllos). The female mostly chooses a woody part of the plant, where the egg may hibernate. The small caterpillars feed on the young leaves. They are attended by Lasius and Myrmica as well as Formica and Camponotus ants, and pupate deep down in the vegetation. Except in Scandinavia where it is single-brooded, the Reverdin’s Blue has two generations a year.
Albania / Austria / Belarus / Belgium (Regionally Extinct) / Belgium: Wallonia (Regionally Extinct) / Bosnia and Herzegovina / Bulgaria / Croatia / Czechia / France / France: Mainland / Germany / Greece / Greece: Mainland / Hungary / Italy / Italy: Mainland / Latvia / Lithuania / North Macedonia / Moldova / Montenegro / Norway (Regionally Extinct) / Poland / Romania / European Russia / Serbia / Serbia: Serbia / Serbia: Kosovo / Slovakia / Slovenia / Sweden (Regionally Extinct) / Switzerland / Ukraine /