The Swallowtail Papilio machaon britannicus is the UK's largest butterfly and one of our rarest, confined to the fenlands of the Norfolk Broads.
These pages are in homage of this very attractive butterfly and serve as a pictorial article on this species' life-cycle along with some observations made at Hickling in 2011.
Egg-laying on Milk Parsley
Egg darkens with age
1st instar larvae to final instar (4 instars (shedding of skin) in total).....
Assuming the position
to pupate on reed stem
Left and centre: Diseased final instar showing osmeterium (orange projections)-produced when alarmed or in distress. Larvae eventually died.