Is Kuala Selangor Synchronous Fireflies happening right now?
As of Jun 19, 2026, 8:54 PM, peak season now, through ~September 30. Earth Exhibit tracks the live conditions and flags it the moment it is on.
Synchronous fireflies congregate in mangrove trees along the Selangor River at Kuala Selangor, where males coordinate their flashes to attract mates.
Tours by small boats at dusk let visitors observe large aggregations of these Pteroptyx species in a near-dark riverside setting.
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 |
|---|
| Kampung Kuantan Jetty (primary firefly boat launches) |
| Kuala Selangor Nature Park - Estuary viewing and shore-based options |
| + 1 more spot, with exact coordinates and timing, in the app → |
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.