The Orange Tip usually can detect if eggs have allready been layed on the flower head of the Cuckoo flower, but here we can see many eggs. Perhaps the crab spider is able to mask the scent of the eggs so it would be able to feed on them later...
This little spider packs powerful venom as it can take down prey much larger than itself, even Butterflies. Its victim here is a Hoverfly (Rhingia rostrata).