Colias hyale hyale (Linnaeus, 1758)

Colias hyale

RANGE . Temperate Europe and Siberia to Transbaikalia, central Yakutia, Mongolia and NW. China.
DISTRIBUTION AND VARIATION. The nominate subspecies is distributed in the European part. In addition, several other subspecific forms are known: ssp. altaica Verity, 1911 - the Altai and Sayan mts.; ssp. irkutskana Stauder, 1924 -Transbaikalia; ssp. palidis Fruhstorfer, 1910 - East Siberia.
HABITAT AND BIOLOGY. Meadows and forest edges up to 2,700 m a.s.l. in the forest and forest-steppe zones. Flight period: April-September in two to three generations. Pupae hibernating. Sometimes migrations can be observed. Host plants (Eckstein, 1913; Ebert, 1991; etc.): Fabaceae (Vicia, Coronilla, Medicago, Lotus, Cytisus, TrifoUum, etc.).
SIMILAR SPECIES. C. poliographus: larger; wings more strongly produced; UPS black pattern heavier. C. sareptensis: FW termen convex; UPS ground colour lemon-yellow; UPH orange double discal spot bright.

Photo and text: Guide to the BUTTERFLIES OF RUSSIA and adjacent territories Volume 1. PENSOFT, Sofia - Moscow. 1997

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