The adults are on the wing from mid May to the end of June, and in
a good year a second brood from the end of August to mid September.
How Hill Environmental Centre: Park in the car park, TG372
190 and walk north west across the lawns, down the cart track to Toadhole
Cottage, TG370 191. Opposite the cottage is a nature trail. Take the right hand
fork to a meadow very close to the starting gate.
Catfleld Fen - Butterfly Conservation Reserve. Take the
small road marked Fenside and park at the Staithe TG 367 214. Access to the
reserve is difficult and a walk from the sluice gate along the bank just
outside the reserve heading south is best as Swallowtails cross this bank
between Barton Broad Great Fen and Catfield Fen.
Hickling Broad - Norfolk Wildlife Trust Nature
South Side of Hickling Broad. Public footpath sign posted 'Weavers Way'. From Potter Heigham Church TG200 419 take route marked on information board. This path is particularly good for viewing in the late afternoon.
Martham Broad. Park in West Somerton TG469 200 and walk west along the south side of the Staithe to TG465 201. Here the public footpath heads south west and then north west around Martham Broad until eventually you reach the River Thurne. Look north for Swallowtails. It was here in 1985 the black form was seen.
Ted Ellis Nature Reserve, Wheatfen, Surlingham
Strumpshaw Fen - RSPB Reserve