This bird was shot in the Nagarhole National Park in India around 4 months back. There was no artificial lighting used nor was this image darkened in PS. It was infact an experiment that we were trying by severely underexposing the subjects in normal lighting conditions and here's the result. I have tried the same technique with different subjects and the results are really interesting.
Canon 7D and 300 F4 + 1.4XTC II
5.6, 1/4000, -2.7ev, ISO 400