Red-underwing Skipper
Spialia sertorius
Spialia sertorius, commonly known as the red-underwing skipper, is a butterfly of the family Hesperiidae. Source
Where is the Red-underwing Skipper now?
No records in the last 8 weeks. It may be out of season where the observers and sensors are.
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When does the Red-underwing Skipper arrive?
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 | 20 April 2026 | 20 April 2026 | 4 May 2026 | 1 |
Download every area as CSV · Review these arrival dates (researchers, ORCID sign-in)
Arriving at the same time in Europe
- Common Cuckoo Cuculus canorus
- Common Redstart Phoenicurus phoenicurus
- Barn Swallow Hirundo rustica
- Eurasian Blackcap Sylvia atricapilla
- Common Chiffchaff Phylloscopus collybita
- Willow Warbler Phylloscopus trochilus
- Eurasian Golden Oriole Oriolus oriolus
- Eurasian Wryneck Jynx torquilla
Every arrival in Europe, month by month
Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured · How it compares with human observers