only the 1st one has had a little editing because it was under exposed...
its a real shame that the focus is ever so slightly out with this shot... you have the top part of the wing in focus and the antennae..
use spot focus or manual focus and focus on the eyes if possible... or increase your aperture to something like f8 until you have the whole body in focus but can still blur the background to some extent
tips with butterflies...
use a macro lens if you have one
if you are out in the open then approach quietly and slowly making sure that you do not cast a shadow over the butterfly
consider either off camera flash or a fill in flash to really bring out the detail and highlight their iridescence
change your angle if possible so that you are low down if you cannot get a 'wings open' shot... the butterfly will look more imposing
go to a butterfly house of which there are several around the UK
