:thumbsup: : The branch leads the eye to the lizard. The eye-contact from the lizard.
:thumbsd: : The dark space at the top is unnecessary. Some details near the lizard head are not captured. The branch is competing for attention as it is of the same colour as the lizard and is quite large.
i'll say a wider framing. the pose of the subject is almost suggestive of 'returning into the dark' so introducing more dark space around the subject will increase the mysterious mood which i am enjoying from this picture.
thanks for the comments guys, please keep it coming
on cropping: i did consider that but couldn't come up with an effective crop that would still maintain the 2:3 ratio (for printing), would appreciate some suggestions.
denniskee: yes, i did position the iguana using the rule of thirds, leaving quite a bit of headroom.
nemesis32: i honestly hadn't considered the light fall-off explanation, but after looking at the shot again, it does make sense to me. somehow i just didn't feel right cropping the top off, as if i'd upset the balance by doing so.
My 2cents. To tell you the truth, I do like the picture as it is. The dark empty space above does give me a feeling by itself. Though the rule of third does apply to many composition, it does not have to apply in all photos. I think a tighter shot may seems too focus on the subject but as it is, it gives me the overall ambience feeling of its environment. The lighting, texture of the branch and position of the iguana gives a very strong aethestic feeling to it.