The honour for the Image of the Month for April 2015 goes to Samrat Sarkar's Wild Water buffalo image from Manas National Park. The image has a painterly feel to it.
The following is the image details shared by Samrat.
Photographed in Manas NP beside BEKI river in Banshbari range in December 2014.
Canon 7D + Canon 500mm f4 + Monopod
ISO 400, 1/800, F4, EC -0.7, full frame, Monochrome done by CS5