The fine weather on Monday had me and the family heading for the delights of Chester Zoo summer holiday season! All was not lost however as I managed to see a Hobby over the East side of the zoo (maybe they are regular in the area, I don't know), other highlights included a Buzzard, plenty of Migrant Hawkers and Peacocks, Holly Blues (its turning out to be a very good season for these), and last but not least a very unusual butterfly species that had obviously escaped from the butterfly house in the Zoo, however I managed to see at least three of them around the zoo, Maybe there is a small feral population? Grasping at straws I know! They certainly got my blood rushing for a moment when I thought they where Swallowtails! Anyone know the ID?