I got lucky with this bird because of the natural perch and background. The bird also managed to sit still long enough to try out different compositions.
Technical: 1D4, 800, f/10, 1/320s, ISO 400.
Post: A little bit of cropping, tone curve adjustments, selective sharpening. Background has a very slight selective vignette applied too.
Aravind what a beauty, sharp, great eye contact with good detail and excellent colours. I like the fluffed chest feathers. Composition is good but might consider taking a little off the bottom to just above the OOF green moss on the perch.
Arvind, terrific sharpness and shades of blue. Good bird angle as well. Moss looks great too. exposure looks spot on.
But, the way the bird is perched, I'd definitely prefer the traditional horizontal format. It would also eliminate the problem of OOF perch and moss at the bottom.