[2][3] The sanctuary is also proposed to be declared an Eco-Sensitive Zone, conforming to the Environment (Protection) Act, 1986 (29 of 1986), for which draft notification has been prepared.

Apart from trees in the peripheral area of the lake, vegetation reported in this wetland consists of emergent and floating aquatic plants of Acacia nilotica, A. leucoploea, Zizyphus, Azadirachta indica, Ficus sp., Salvadora sp., Prosopis chilensis, and Capparis sp.

[2] According to the Normal Biological Spectrum (NBS) study of the sanctuary, drought resistant vegetation in the category of Bio-geographiczone – IV consisting of thorny shrubs and trees are found, and also reported are mixed flora of aquatic and marshy plants.

[5] Thol Lake, as a bird sanctuary, an inland wetland and a protected area, is known as a very good habitat for waterfowl during the monsoon season, extending through the winter.

Many winter visitors like great white pelicans, flamingos, a variety of waterfowl including mallards and large numbers of geese, sarus cranes and many other waders are common site at sanctuary.

According to the IUCN categorization, the birds reported in the area are: greater flamingo (Phoenicopterus roseus) of least concern species; Dalmatian pelican (Pelecanus crispus), greater spotted eagle (Clanga clanga), sarus crane (Antigone antigone), and Indian skimmer (Rynchops albicollis) of the vulnerable species; and the white-rumped vulture (Gyps bengalensis) and Indian vulture (Gyps indicus) of the critically endangered species.

[2] Some of the important fauna reported in the area surrounding the lake are: bluebull (Boselaphus tragocamelus), golden jackal (Canis aureus) and blackbuck (Antilope cervicapra).