Personally, I don't think you can really critique this piece in a negative light. You're really up close to the dragonfly - which is something difficult to even think about, really. I've tried to get pictures like this and it's very hard. Impossible, to be honest.
If anything, I'd love to see what someone could do in a photo manipulation program to really amplify the colors or even make them more psychedelic. But that later bit is more or less just for fun. The incredible detail that the camera, and the photographer captured is just phenomenal!
What a queer creature you got there. You do a really great job emphasizing some of it's unique features with wonderful focus. I love how only his head, part of his leg, and a sliver of the wood is in focus. It really lets you evaluate key parts of this animal in good detail without completely overwhelming the viewer. The small part of the table you have in-focus really brings it together- you've given this otherwise out-of-world insect a firm, everyday backdrop that we can relate too.
Speaking of detail, I really, really like how you can see the individual hairs on top of his head and the side of his 'face'. Plus his hair legs are so defines- so rare to see such a sharp image of insect legs!
The colors on the creature, as well, are just so vivid! I'm glad you kept them so bright.
What kind of camera do you have? Ive got a Nikon D80 with a 18-55 lens. Pretty basic but a nice cam!! I just started with photography, 4, 5 months now, i love it!! And you? Really nice pics, my compliments!