🐦 CA Bird Atlas
Designed to support the California Bird Atlas, powered by eBird / Cornell Lab of Ornithology.
How to use
Tap any block on the map to see its effort statistics. Enable location to automatically track your current block while in the field.
- Diurnal hrs
- Total hours of daytime survey effort
- Nocturnal hrs
- Total hours of nighttime survey effort
- Checklists
- Complete eBird checklists submitted
- Confirmed spp
- Species confirmed breeding
- Coded spp
- Species with any breeding evidence code
Overlays
- Block outlines
- Atlas block boundaries
- County outlines
- County boundaries (visible at zoom ≥ 10)
- Zero effort
- Purple outlines — blocks with no checklists yet
Data
Effort data cached hourly from Cornell's GeoServer. Block boundaries © Cornell Lab / eBird.
Enabling location on mobile
- Safari (iOS)
- Settings → Privacy & Security → Location Services → Safari → While Using. Also check Settings → Safari → Location → Allow.
- Chrome (Android)
- Tap the lock icon in the address bar → Permissions → Location → Allow. Or: Settings → Site Settings → Location → allow this site.
- Firefox (Android)
- Tap the lock icon → Edit Site Permissions → Location → Allow.
- Samsung Internet
- Tap the lock icon → Location → Allow while visiting.
- All browsers
- Your device-level Location must also be on: iOS Settings → Privacy & Security → Location Services; Android Settings → Location → On.
This project is entirely self-funded and has no affiliation with eBird or the Cornell Lab of Ornithology. Consider supporting eBird.
© Metolius Research / Bart Wickel, 2026