As of today, peak season now, through ~June 25. Earth Exhibit tracks the live conditions and flags it the moment it is on.
The endemic Norfolk Broads swallowtail (Papilio machaon britannicus) is confined to fen and reedbed habitats in the Norfolk Broads.
Adults are active on warm, sunny days in late spring and early summer while larvae feed on milk-parsley in wet grazing marshes.
Sightings are strongly weather dependent and concentrated at a few protected reserves.
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 |
|---|
| Strumpshaw Fen RSPB Reserve |
| Hickling Broad National Nature Reserve (NWT) |
| + 2 more spots, 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.