Ousteri Lake is located towards the north at a distance of 10 km from Pondicherry town (Pondicherry– Villupuram road). The wetland covers an area of about 390 ha (lies in both Tamil Nadu and Pondicherry) with a wide range of aquatic species and is mainly a bird sanctuary. The vegetation ranges from small herbs to trees, which supports migratory avifauna as well as native birds during summer and winter. The government of Pondicherry is proposing to set up an Ousteri National Park in the region acquiring lands from neighbouring villages.