Siliserh lake, situated in vi lage Paitpur, Tehsil Alwar, district Alwar in the state of Rajasthan has an area of 315.97 hectares (ha). This site is located 13 km away from the city of Alwar at 27° 32\' N latitude and 76° 9’ E longitude at an elevation of 298.93 m above MSL. This site is located within the buffer area of Sarika Tiger Reserve and is extensively used by resident faunal species including tigers and other key species supported by the tiger reserve. This human-made wetland was created in 1845 AD by Maharaja Vinay Singh, by constructing a bund across the tributary of the River Ruparel. He named the wetland in honor of his wife Seela. The wetland was built with the dual purpose of providing drinking water to the city of Alwar and catering to the irrigation needs of the local communities. The wetland is sti l crucial for water security for the region as it provides approximately, 4 MCM of water to irrigate a command area of 7.2 km2. In addition to this, the wetland also recharges groundwater, thereby, contributing to the water security of the Alwar city. Another important provisioning service of the wetland is fish culture, which provides livelihood opportunities to local fishermen communities. Furthermore, its diverse aquatic habitats offer a significant refuge, particularly for migratory water birds, supporting a high concentration of both migratory and resident water bird species, as wel as threatened mammal and reptile species, many of which are of conservation importance. It supports a population of 149 species of birds out of which 71 species are water birds. It is home to several threatened taxa, which includes one (01) endangered bird species and two (02) mammal species and seven (07) vulnerable (Mammals: 2, Birds: 3, Reptile: 2) species . The site supports over 1% of the biogeographic population of Black Stork (Ciconia nigra). The site also supports mammal species such as Tiger (Panthera tigris) and Indian Pangolin (Manis crassicaudata), Leopard (Panthera pardus) and Sambar (Rusa unicolor). The vegetation cover in the periphery includes Gum Arabic tree (Acacia nilotica), Kadam (Anthocephalus cadamba), Khair (Acacia catechu) etc. This site is a tourist destination with a boating facility and attracts a large number of tourists and local people.

A wetland should be considered internationally important if it contains a representative, rare, or unique example of a natural or near-natural wetland type found within the appropriate biogeographic region.

A wetland should be considered internationally important if it supports vulnerable, endangered, or critically endangered species or threatened ecological communities.

A wetland should be considered internationally important if it supports populations of plant and/or animal species important for maintaining the biological diversity of a particular biogeographic region.

A wetland should be considered internationally important if it supports plant and/or animal species at a critical stage in their life cycles, or provides refuge during adverse conditions.

A wetland should be considered internationally important if it regularly supports 20,000 or more waterbirds.

A wetland should be considered internationally important if it regularly supports 1% of the individuals in a population of one species or subspecies of waterbird.

A wetland should be considered internationally important if it supports a significant proportion of indigenous fish subspecies, species or families, life-history stages, species interactions and/or populations that are representative of wetland benefits and/or values and thereby contributes to global biological diversity.

A wetland should be considered internationally important if it is an important source of food for fishes, spawning ground, nursery and/or migration path on which fish stocks, either within the wetland or elsewhere, depend.

A wetland should be considered internationally important if it regularly supports 1% of the individuals in a population of one species or subspecies of wetland-dependent nonavian animal species.