A Gardening Day

Spent the day doing jobs in the garden. Butterflies come out with the sun but I'm hopeless at identification. The verbena bonariensis attracts 3 different types.  This is one, the other two in extras.  Viewed large you will see he (she?) is sucking up the nectar. The clematis in our neighbour's garden is covered in peacock butterflies, one of the few I can identify , but they don't flit over to the verbena. 
Checked the RHS site to see if verbena bonariensis has a common name to save me having to type it in full;  Argentinian vervain, that's not much help really.