The pupae are 12.4–12.8 cm long and last 15–25 days (early May to late June in the UK).
They are white with black and orange-brown blotches.
Pupae are usually found close to the ground in or beneath dead leaves.

A study in Cornwall, England, recorded mortality rates in the region of 50%, mostly from predation by small mammals, but including predation by beetles, and parasitism.
The pupae are 12.4–12.8 cm long and last 15–25 days (early May to late June in the UK). They are white with black and orange-brown blotches. Pupae are usually found close to the ground in or beneath dead leaves.
A study in Cornwall, England, recorded mortality rates in the region of 50%, mostly from predation by small mammals, but including predation by beetles, and parasitism.
Heath fritillary