Answer from Shekar Dattatri, Conservation India:
The simple answer to your query is that most wildlife species in India are covered under one of the Schedules of the Wildlife (Protection) Act, 1972, and keeping them in captivity without a permit from the Chief Wildlife Warden can invite a fine or imprisonment or both. Getting a permit is by no means easy and may require a convincing written application and personal meetings with the concerned officials in the Forest Department. A careful scrutiny of the Wildlife Act will give you a clear idea as to which species are protected and which are not. Even if a species is not specifically covered under the Act, and even if it is not native to India, Forest Officials may unwittingly seize them if they are not able to ascertain the correct identity of the animal.
Given all this, it is best not to keep any wild species as pets. We recommend that you watch them without disturbance in their wild habitats.