Nice set of images Atul, Good details and well exposed. liked the second image a lot.the wing blur and the landing pose with the catch looks very nice.

It is good that you have recorded your observation along with supporting images. Over a longer time frame and with a larger set of observations you will be able to make more definitive conclusions on aspect like selection of perch, hierarchy, choice of prey and the general behavior traits you have noted. More sets of random observations like these will form the required empirical base. Nice to know that you are taking the effort and spending time, not many feel this is a priority nor have the patience required.

Prey is thrashed against a solid surface by birds not only to kill but also to soften and remove the hard Exoskeleton, stings, sharp projections and spikes in many insects and other prey. These undigested harder parts if consumed are regurgitated as pellets.

TFS
Roopak