As of Jun 19, 2026, 8:54 PM, confirmed recently, likely happening now. There is recent confirmation nearby. Earth Exhibit tracks the live conditions and flags it the moment it is on.
Each year small forested groves near Nanacamilpa, Tlaxcala, host huge aggregations of synchronous fireflies (Photinus spp.).
For several weeks the male fireflies flash in near-unison, producing dense waves and curtains of light in the understory.
The phenomenon is driven by local microclimate and the early rainy season and is managed by community cooperatives that run guided night visits.
Where to see it
A taste of where to see it. The full map, exact coordinates and the best timing for each spot live in the app.
| Viewing spots |
|---|
| Santuario de las Luciérnagas (Nanacamilpa Community Sanctuary) |
| Private/Community Groves and Ranch Viewing Areas (Nanacamilpa outskirts) |
This is the short version
This page shows a taste. The app has the full list of where to see this, the exact timing, and live conditions for 1,000+ natural phenomena worldwide, so you know the moment one is genuinely worth the trip.