No place to hide
Murali - an interesting point of view of this well camouflaged reptile and the out of focus background is a good way to show it off. Unfortunately I am not sure what has happened to your focus because it is very blurred. This could be one of three things. The focus point was not on the animal, it may have been centre weighted and off in infinity, or it may be you were too close for the lens to focus properly. The final option is camera shake but I don't think that is the problem here. Have a look at the manual that comes with the camera body and work out how to select an off centre focus point. If you had done that then I suspect you were too close for the lens. Good luck and keep practising - it'll all be worth it when you get a shot like this that is perfectly focused. Regards Phil.
I totally agree with Phil, the idea behind the picture is excellent, but the focus is not all that good. since you shoot digital its always better to shoot some record shots and preview the picture on LCD before making adjustments/moving off