California Bat
Myotis californicus
The California myotis is a species of vesper bat. It is found in British Columbia in Canada, Guatemala, Mexico, and in the western United States, including California. Source
Where it is now
In the last 8 weeks this bat was recorded 13,560 times across 4 areas (each area is a 5 degree square).
See the California Bat 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 | 24 August 2026 | 24 August 2026 | 31 August 2026 | 1 |
Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.