HDR stands for high dynamic range imaging. The HDR method basically involves making up an image from several different photographs of the same thing, all taken with different exposures. Photoshop or similar image editing software is then used to combine the photos to form one image, creating a greater dynamic range of luminances, which means starker contrasts between light and dark and much more vibrant colours.
HDR enhances natural colours and light levels, so it’s often hard for the viewer to tell that the HDR method has been employed. Some photographers, however, push things further to create completely distorted visual realities. It’s clear from the 24 photos below that HDR and wildlife photography is a winning combination, as the technique is capable of doing justice to the spectacular array of colours found in nature.
Reference: Fudge Graphics