There is an excellent book in English on Ornitology and an impressive, but not so huge list of Flora in India in German. About Fauna in India there is only a book I'm aware about dogs. Advice wanted.
You better do not trust most of the dictionaries, because they say, that पुष्कर «blue lotus», क्रौञ्च «the curlew or snipe» и एणी «female antelope» - and that is not really so. For that reason I would love to hear some stories around some mistakes in the dictionaries regarding the taxonomy and some stories how to get around them with trustable sources:
1) Flora
Renate Syed: Die Flora Altindiens in Literatur und Kunst, Dissertation, Ludwig-Maximilians-Universität München 1990
2.1) Ornitology
Birds-in-Sanskrit-Literature.pdf
2.2) Fauna
Bollée_Gone to the dogs
Regards,
Dr. Mārcis Gasūns