The Nilgiri Biosphere Reserve includes all the important forest types that are to be found in South India as well as some that are just peculiar to the belt such as Tropical Thorn Forest, Tropical Dry Deciduous Forests, Tropical Moist Deciduous Forests, Tropical Semi Evergreen Forests, Sub Tropical Broad Leaved Forests, Tropical Wet Evergreen Forests, Southern Montane Wet Temperate Forests, Southern Montane Wet Grasslands and Subtropical Hill Savannas.

Forest Divisions

The NBR is spread over a large within three states and varied climatic zones. The forest divisions are as follows:

Coimbatore Division Nilgiri South Division Erode Division
Satyamangalam Division Nilambur Division Mudumalai Sanctuary
Wyanad Division Palghat Division Chamrajnagar Division
Project Tiger Bandipur Mysore Division Hunsur Division

Protected Areas

The large contiguous extent of forest has the highest density of protected areas in the entire nation for so small an area.

No. Name District Area (ha) Notification Perceived Threats
1 Mudumalai WLS & NP Nilgiris 21776 27.01.1940 Exotics, anthropogenic pressures
2 Mukurthi NP Nilgiris 7846 15.10.1991 Introduction of exotics, poaching
3 Wyanad Wyanad 34444 03.05.1973 Degradation, Biotic pressures
4 Bandipur NP Mysore 87420 15.03.1985 Uncontrolled tourism
5 Nagarhole NP Mysore & Kodagu 64339 01.04.1983 Uncontrolled tourism
6 Silent Valley NP Palakkad 8952 15.11.1984 Extraction of medicinal plants, removal of timber & poaching