in these sanctuaries: Nilgiri Tahr , the Grizzled Giant Squirrel , the Nilgiri Wood-pigeon , Elephant , the Gaur , the Nilgiri Langur , the Sambar , and the Neelakurinji (a plant that blossoms only once in twelve years). West: The Eravikulam National Park East: Kurinjimala Sanctuary and Palani Hills National