Scrub lands, including the Deccan thorn scrub forests, are common in the interior Deccan plateau. Some of India's famous protected areas are found in South India. These include Project Tiger reserves Periyar National Park, Kalakad - Mundanthurai and Nagarjunsagar-Srisailam Tiger Reserve. Important ecological regions of South India are the Nilgiri Biosphere Reserve, located at the conjunction of the borders of Karnataka, Kerala and Tamil Nadu in the Nilgiri Hills including Mudumalai National Park, Bandipur National Park, Nagarhole National Park Silent Valley National Park, Wayanad Wildlife Sanctuary and Sathyamangalam Wildlife Sanctuary and the Anamalai Hills including the Eravikulam National Park, Chinnar Wildlife Sanctuary, Parambikulam Wildlife Sanctuary and the adjacent The Indira Gandhi Wildlife Sanctuary and National Park of the Western Ghats. Important bird sanctuaries including Ranganathittu Bird Sanctuary, Kumarakom Bird Sanctuary, Nelapattu and Pulicat Sanctuary are home to numerous migratory and local birds. Other protected ecological sites include the backwaters like the Pulicat Lake in Andhra Pradesh, Pitchavaram in Tamil Nadu and the famed backwaters of Kerala formed by the Vembanad Lake, the Ashtamudi Lake and the Kayamkulam Lake.