Mazarine Blue
Cyaniris semiargus
Cyaniris semiargus, the Mazarine blue, is a Palearctic butterfly in the family Lycaenidae. Source
Where it is now
No records in the last 8 weeks. It may be out of season where the observers and sensors are.
See the Mazarine Blue on the live map
Movement and weather
Over the weeks it was present in the past year, its centre in Europe ranged from 50°N in May to 63°N in June, about 1,500 km apart.
Arrival dates
The week it was first heard regularly in each region, after at least six weeks away. Dates differ from south to north, so a region has a range.
| Region | First arrival | Last arrival | Typical peak | Areas |
|---|---|---|---|---|
| Europe | 27 April 2026 | 22 June 2026 | 22 June 2026 | 4 |
Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.