Hi Ian - very nice image. I agree with Loi on the sharpness, detail and handling of light. In an ideal world the one on the left would not be angled slightly away.
This really works for me, I adore these little chaps and I could watch them interact for hours on end!
I guess the light couldn't be to harsh, judging by the positioning of the tails - they normally use their tails as umbrellas when the sun is too hot. Beautiful detail and the flower makes this very special, I enjoyed viewing very very much, thank you Ian!