The Tiger Reserve remains dry most of the year, however, it changes dramatically during monsoons with thick undergrowth. During the summer months the temperature soars up to 45oC and the entire jungle turns brown except for the valleys.
The topography of Sariska supports scrub-thorn arid forests, dry deciduous forests, rocks and grasses.. Anogeissus pendula (Dhok) is the dominant tree species covering over 90 per cent area of the forest. Boswellia serreta(Salar) and Lannea coromandelica(Godal) grow at rocky patches. Acacia catechu( Kattha tree) and bamboo are common in the valleys. Some valleys support Butea monosperma(Palash) and Zizyphus(Ber) species. Besides these, some noteworthy tree species are Terminalia arjuna(Arjun), Commiphora wightii(Gugal), Sterculia urens(Kadaya), Emblica officinalis(Amwala), Terminalia bellerica(Baheda) In fact during summer when most of grasses are dry and are nonpalatable, the highly nutritious Anogeissus leaves after drying fall on the forest floor and thus provide best possible nutritious food to Sambar, Chital, Nilgai. 55 species of grasses enrich the important ground flora of Sariska, scattered over the entire reserve and playing an important role in the distribution of wildlife. Grasses are the main source of food for herbivores & omnivores.
The main Sariska-Kalighati-Slopka-Umri valley supports dense population of of wild life with high diversity as this is the richest part of the reserve as far as edible grasses are concerned alongwith various shurbs & fruit bearing trees which provide the preferred food to various faunal species round the year in one or the other form. Sometime in the past, ber groves were planted at several places in the reserve. They have proved a boon for the herbivores, particularly langurs. They eat less and drop more to the ground, where spotted deer, sambhar and blue bull collect in large number to the feed on the dropped fruits.
Wildlife Sariska is an extremely rich reserve as far as wild life is concerned. Apart from its crown spp.,tiger ,it is inhabited by number of other important carnivores like leopard,hyeana,,jungle cat,civets,caracal. Among omnivores jackal and wild pig are quite common and can be seen in any corner of the reserve. sambar, chital, nilgai too have occupied every part of the reserve. Sariska supports largest population of sambar among all the reserves spread over the entire country. Hanuman langur is another attraction in Sariska. They can be seen playing every where in the entire reserve. Rhesus macaque have become a nuisance especially around Sariska H.Q.
Birds High floral diversity is supporting high diversity in the avian fauna as well. Sariska with about 10000 peafowl, supports largest population in world. Grey partridge, bush quail, tree pie are most common. Black partridge, button quail, sand grouse, paradise flycatcher, green pigeon, golden back wood pecker ,blossom headed parakeet are occasional. Among raptors black wing kite is common. crested serpent eagle and the great indian horned owl are occasional. During monsoon several spp. of piscivorous birds enrich various water bodies of the reserve. Sizable number of black storks can be seen at Karna Ka Bas water body.. During winter several migratory birds like pin tail, pilchards, teals, showeler, avocet visit the water bodies every year. Bar headed geese offer special attraction. Occasionally sariska is visited by pelicans also.
Reptile Several reptile spp. including Snakes, lizards and Pangolin inhabit Sariska. It also supports a sizable number of Asiatic rock python. The Silisedh lake is full of crocodiles. .