Nagarjunsagar Srisailam, the tiger reserve with the largest total area in NTCA's list
Background
The National Tiger Conservation Authority lists Nagarjunsagar Srisailam as the tiger reserve of Andhra Pradesh, the only one shown for the State. In the Authority's table of tiger reserves the entry reads "Nagarjunsagar Sagar", Andhra Pradesh, with a protected area notification year of 1982-83 and a tiger reserve notification year of 2007. Its core area is given as 2,595.72 sq km and its buffer area as 700.59 sq km, for a total area of 3,296.31 sq km. That total is the largest for any tiger reserve in the Authority's table. Assam, by comparison, is shown with four tiger reserves — Kaziranga, Manas, Nameri and Orang — of which Manas is the largest at 2,837.10 sq km total, placing it next after the Andhra Pradesh reserve.
In plain words
Core area Core area — The critical tiger habitat of a reserve, kept free of human use.
Buffer area Buffer area — The surrounding zone of a tiger reserve where regulated human use is allowed.