My friend and I have been studying a group of about 15 Indian Coursers for quite some time now. Our initial approach was to just sit near a fixed tree everyday for long hours and now after about 3 months these beautiful birds have become quite used to us. Also, an important point I would like to mention here is that as much as they are used to us they tend to fly away at the slightest disturbance by other people.
Exif Data as below. Shot at 500mm.
Aperture : f7.1
Shutter Speed : 1/1000s
Exposure : Manual
Expo Comp : +0.3EV
ISO : 400
Metering : Centre Weighted
Selective sharpening done to enhance the details. Cropped only slightly for composition and adjusted layers and curves. White balance as shot.