Located on an isolated hillock in Vallanadu Village of Srivaikundam Taluk, it is the southernmost place in India where a natural population of blackbuck exists.

and a few Azadirachta indica, Dodonaea viscosa Carissa carandas, Pterolobium hexapetalum, Euphorbia, Acalypha fruticosa and Ocimum tenuiflorum form the undergrowth.

Peafowl, heron, stork, grey partridges, jungle crow, common quails, pied crested cuckoo, crested-hawk eagle, black-winged kite, curlew, lapwing, nightjar, sparrows, horned owl, and nearly 100 other species of birds are found in the area.

Thick acacia growth makes it difficult to determine a precise population count.

7 lakh, earmarked under the Centre's "Development of Sanctuaries" scheme will be spent to repair fencing, increase the height of a watchtower by 14 metres, improve the water supply and erect awareness boards.