Being a nature photographer, I think one of the tough subject to make meaningful image of are snakes. Unlike birds they don't have favourite perches to sit and pose for! They are long, unless they are made to coil getting them whole on a frame is tough, most of the time they move quickly and disappear in under-growths. I don't like lots of snake images because most of them are made in an un-natural manner - like for example irritating them to open the hood, mouth etc. Why a cobra opens its hood looking at a photographer ? Snake in a perfect clean out of focus background ? I think some those images lack natural feel.
During my recent trip to Dandeli, I tried making a few images of Common Bronze-back. I tried making images of it without disturbing its natural behaviour. One technique I learnt is just observe and make images at right time. 300mmf4 lens appears like a perfect fit for this task. It is possible we may not make images which I prefer it more than irritating them to open hood or mouth.