From page 20 of Birds of India:
The enlightened and benevolent attitudes of Hinduism and Buddhism towards wildlife have helped to conserve the rich natural heritage of the Indian subcontinent. India has a tradition of protection of all forms of animals dating back at least 3,000 years when the Rig Veda mentioned the right of animals to live. Sacred groves, village tanks, and temples where the hunting and killing of all forms of life is prohibited can be found throughout India.
Birds of India: Pakistan, Nepal, Bangladesh, Bhutan, Sri Lanka, and the Maldives
Richard Grimmett, Carol Inskipp & Tim Inskipp
The best field guide to the birds of the Indian subcontinent is now even better. Thoroughly revised, with 73 new plates and many others updated or repainted, the second edition of Birds of India now features all maps and text opposite the plates for quicker and easier reference. Newly identified species have been added, the text has been extensively revised, and all the maps are new. Comprehensive and definitive, this is the indispensable guide for anyone birding in this part of the world.