Eravikulam National Park is 97 sq. km. in extent, situated along the crest of the Western Ghats in the High Ranges of Idukki district of Kerala state, India.
The Park holds the largest viable population of the endangered (IUCN) Nilgiri Tahr (Hemitragus hylocrius).
Apart from tahr, the Park is the abode of other little known fauna such as Nilgiri marten, ruddy mongoose,small clawed otter,dusky striped sqirrel etc