Lovely natural history moment. I am yet to see them mating. How many seconds did it last?

When you are shooting images with sky in the background, you need to be careful about the exposure. You need to give positive exposure compensation to bring out the details in the birds. Pulling up the exposure later during post processing increases the noise. You may like to check the following tutorials on exposure:
http://www.indiawilds.com/forums/showthread.php?t=2006
http://www.indiawilds.com/forums/showthread.php?t=1970

Thanks for sharing this image. Look forward to more from this series.

Cheers,
Sabyasachi