| The total area of the Bio-sphere reserve is 3500.36 Sq. K.m out of which 1828 Sq. Kms. is in Kerala and 1672.36 Sq. Kms. is in Tamil Nadu. The Bio-sphere Reserve now covers parts of Tirunelveli and Kanyakumari District in Tamil Nadu and Thiruvananthapuram, Kollam and Pathanamthitta District in Kerala. The Biosphere lies Between 8 degree 8 minutes to 9 degree 10 minutes North Latitude and 76 degree 52 minutes to 77 degree 34 minutes East Longitutudes. |
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| The Biosphere reserve is split into three major zones viz. Core Zone, Buffer Zone and Transition Zone. |
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| In Kerala the break up for the above three zones are as follows: |
| Core Zone |
352 Sq. Km |
| Buffer Zone |
691 Sq. Km. |
| Transition Zone |
1828 Sq. Km. |
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| The sanctuaries covered are Neyyar, Peppra and Shenguruny sanctuaries. |
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| In Tamil Nadu the break up for the above three zones are as follows |
| Core Zone |
691 Sq. Km |
| Buffer Zone |
198.36 Sq. Km. |
| Transition |
1672.36 Sq. Km. |
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| The sanctuaries covered are Kalakad Mundanthurai Tiger Reserve. |
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