PARAGUAY
Member
You could be right but @Gavin3171 picture shows strong colouration and the book says the European species are very pale in comparison .It says attempt to reintroduce to the fens in Cambridgeshire was underway in 1968 , so right next to Essex .? European species make their way across apparantly attracted by root crop growing in Southern England. Surprising were this hobby sends you. Great picture by GavinThe butterfly looks like a swallowtail, but not the British species that now lives only in the Norfolk broads. As @Gavin3171 is in Essex, it could be a visitor from Europe. It looks similar to the Citrus Swallowtail, but that one is American.