Srivilliputhur Megamalai Tiger Reserve is located in Tamil Nadu.

Explanation:
Srivilliputhur Megamalai Tiger Reserve is a popular wildlife sanctuary located in the southern state of Tamil Nadu, India. It is spread across the Virudhunagar and Theni districts of the state. The tiger reserve is a protected area that aims to conserve the biodiversity and natural habitat of various species, including the endangered Bengal tigers.

Key Points:
1. Location: Srivilliputhur Megamalai Tiger Reserve is situated in the Western Ghats, a mountain range that runs parallel to the western coast of India. It is located in the southern part of Tamil Nadu, bordering the states of Kerala and Karnataka.

2. Rich Biodiversity: The tiger reserve is known for its rich biodiversity, harboring a diverse range of flora and fauna. Apart from Bengal tigers, it is home to several other species such as Indian elephants, Indian gaurs, sloth bears, sambar deer, and many more.

3. Importance: The Srivilliputhur Megamalai Tiger Reserve plays a crucial role in the conservation of wildlife and preserving the ecological balance in the region. It acts as a habitat for various endangered and endemic species and also contributes to the overall biodiversity of the Western Ghats.

4. Conservation Efforts: The government and forest department of Tamil Nadu have undertaken several initiatives to protect and conserve the wildlife in the tiger reserve. This includes measures like anti-poaching drives, habitat restoration, community participation, and eco-tourism activities that generate awareness and promote sustainable practices.

5. Ecotourism: The tiger reserve also attracts tourists and nature enthusiasts from across the country who visit to experience the natural beauty and wildlife of the region. The reserve offers various activities like trekking, wildlife safaris, birdwatching, and nature trails to engage visitors and promote eco-friendly tourism.

In conclusion, Srivilliputhur Megamalai Tiger Reserve is located in Tamil Nadu. It is an important protected area that aims to preserve the biodiversity and natural habitat of various species, including the endangered Bengal tigers. The reserve also contributes to the conservation efforts and promotes eco-friendly tourism in the region.