The nilgai was renamed "nilghora" which means blue horse.Apart from the reason mentioned by you the other was that due to the destruction to crops by this animal farmers wre permitted to kill them if necessary.This gave a free license to non-hindus i.e. moslems to hunt them and enjoy the meat.Not happy with the way things were going it was decided to rename the beast.
I did take some photos .i.e. my friend did ,and as soon i recieve them i will post them to you.