Explanation:

The zoo grew and expanded to accommodate eye-catching exotic ones like chimpanzees, white rhinos & black rhinos, zebras, ostriches and giraffes from Africa; puma, jaguar and llama from South America and kangaroos from Australia. To get these exotic animals the zoo used to send indigenous animals like one horned Indian rhinoceros and others, to many countries. Through later the importance was shifted to indigenous species and several captive breeding programs also started which were successful. In the year 1959 a forest division was created as Assam State Zoo Division and the zoo was put under this division. The Assam State Zoo also added a museum and in the year 1982 a botanical garden and so Assam State Zoo became The Assam State Zoo cum Botanical Garden.