I like how it feels he is being nosey of what is going on the other side of the fence showing curiosity.
I really love how original this felt after seeing it. Thumb view doesn't do this justice, full view is a must. I've seen so many photos of butterflies and this one feels so different and the way you captured this is certainly amazing. I love the clarity of the shot how everything is so focused so well.
The background really makes this for me because the colors are so smooth and don't distract you from the main focus.
I really like this. I think it is unusual as far as butterfly photos go, but it is vibrant, and the colors are great. The eye and bristles on that thing blew me away. I think this idea is downright brilliant. Insect photos for the win!
That being said, this is a critique so I will mention something which I would have liked to have seen, and that is a bit more depth of field towards the foreground, or perhaps a tighter focus. I found the slight blur of the fence slightly distracting, and would have liked to have seen the entire antennae in focus.