Lesser Maple Spanworm
Macaria pustularia
Speranza pustularia, the lesser maple spanworm, is a moth of the family Geometridae native to North America. Adults are on wing from May to July in the south and from June to August in the north. There is one generation per year. 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 Lesser Maple Spanworm on the live map
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 |
|---|---|---|---|---|
| North America | 15 June 2026 | 15 June 2026 | 15 June 2026 | 2 |
Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.