The Nilgiri District is located in the far West of Tamil Nadu, covering an area of 2452.5 sq.km and bordering Coimbatore district in the East; Kerala state and Coimbatore district and in the South; Kerala state in the West, and Karnataka state and Erode district in the North.
Etymologically the word Nilgiri means ‘blue mountains’, which some sources claim is due to the smoky haze in the area, but other sources attribute to the Kurunji flower, which blooms every twelve years producing a bluish tinge. The hills provide cool relief from the surrounding plains. The rare climatic and geological conditions, combined with the natural and cultural diversity, make the Nilgiris of great interest and importance to scientists, ecologists, anthropologists and sociologists alike. The Nilgiris have four identifiable seasons, namely winter (November to February), summer (March to May), South-West monsoon (June to September) and the inter-monsoon (October).