I like the image, my immediate reservation is that for me it is too close to the subject. This is for two reasons, the first is there is little context - it is on a grass seed head but I would like to see the stem so we "know where we are". Secondly the fantastic detail you have caught is detracted by the OOF antenna tip. (I think you have a few dust bunnies creeping in on the lower LHS).
Colours exposure etc look top notch, it looks like an unusual butterfly - I have never seen one before - bet you're going to tell me they are common!