I have been struggling to find a reliable and easy to read source to learn about various national parks and wildlife sanctuaries. UPSC had asked 2 questions related to the topic last year(namdapha and keibul lamjao). I have read shankar IAS for environment, but could not find such information. I donot think searching internet for each and every place would do as we have more than 100 such places, most of which would not have any uniqueness.
If you know any source to read about such stuff, please share