Aravalli is the Oldest mountain range found as a residual mountain and broken residual hills. Central Aravalli including Aravalli range spread as parallel ranges and continuous rocky terrain interrupted by Valleys and sand dunes mainly spread Ajmer and Rajsamand districts. The Ajmer Aravali including Rajgarh hills, Badliya and Pushkar Valleys are very rich in Mammalian biodiversity. The exploration and intensive trips were made during the year of 2020 , 2021 , 2022-23 revealed a total 31 large and small mammalian species of animals. wild boar (Sus scrofa) , Porcupine, (Hystrix indica), Mongoose (Herpestes edwardsii), Civet (Paradoxurus hermaphroditus), Hedgehog (Erinaceus europaeus), Siyar (Canis aureus), Panther (Panthera pardus ) and Sloth bear (Melursus ursinus) are few rare species studied. Although the mammalian diversity reflects a satisfactory appearance, the habitat destruction, deforestation, Poaching and changing land use patterns are major and serious threats for these beautiful animals involved in ecosystem stability.