Biodiversity Hotspots in India: The Four Regions

India overlaps four recognised biodiversity hotspots: Himalaya, Indo-Burma, Western Ghats and Sri Lanka, and Sundaland. They are large ecological regions, often extending across countries. The Indian part of Sundaland is the Nicobar Islands; the Andaman Islands belong to Indo-Burma.

The four-region list appears in India's Convention on Biological Diversity profile. For the worldwide total, Conservation International currently recognises 36 hotspots, checked on 8 October 2026. Some older official and educational pages still mention 34 or 35. Their publication context matters.

What qualifies a region as a biodiversity hotspot?

In this conservation framework, both conditions must be met:

1. The region contains at least 1,500 endemic vascular plant species.
2. It has lost at least 70% of its original native vegetation.

These are the criteria recorded with Conservation International and partners' hotspot dataset. Endemic means naturally restricted to a particular area. The qualifying plant species are endemic to the whole hotspot, not necessarily to India's portion of it.

The label therefore combines biological distinctiveness with severe habitat loss. It does not simply mean a place with many animals, a popular wildlife destination or a location currently experiencing hot weather. If you are new to the subject, start with the three types of biodiversity.

The four biodiversity hotspots that overlap India

The table combines the national list with regional descriptions in India's Fifth National Report and the island distinction confirmed in NITI Aayog's April 2026 Divya Bharat publication. Use the official boundary dataset for a precise location, rather than colouring entire states from this summary.

1. Himalaya

The Himalayan hotspot includes both western and eastern sections of the mountain region. India's Fifth National Report describes a progression from grasslands and forests near the foothills through temperate and coniferous forests to alpine meadows at higher elevations. A single mountain outline therefore contains very different ecological conditions.

This helps explain why altitude belongs in a biodiversity description. A record from one valley or elevation cannot represent every habitat in the mountain range. When reading about a Himalayan species, look for its actual distribution and habitat, rather than assuming it occurs across the entire hotspot.

A useful learning exercise is to compare two local habitat descriptions at different elevations. Ask what changes in vegetation, water availability and species records. Keep that local comparison separate from the regional hotspot label.

2. Indo-Burma

Indo-Burma extends beyond India's northeast into mainland Southeast Asia. Its Indian connection also includes the Andaman Islands. The Andaman and Nicobar administration's forestry and wildlife plan explicitly places Andaman in Indo-Burma and Nicobar in Sundaland.

A map of political northeast India and a hotspot map answer different questions. The former shows administrative boundaries; the latter shows conservation regions. That is why a whole-state checklist can hide transitions between the Himalaya and Indo-Burma hotspots.

People are part of these landscapes. A 2025 UN India account of work in Meghalaya describes community knowledge and ecosystem-based approaches. Read regional conservation as a question of habitats and local livelihoods together, rather than as a map of uninhabited wilderness.

3. Western Ghats and Sri Lanka

The Indian section follows the Western Ghats in peninsular India. UNESCO's Western Ghats description highlights high endemism and habitats including shola forests, seasonally flowering meadows and Myristica swamps. It also identifies characteristic animals such as the lion-tailed macaque and Nilgiri tahr.

Those examples show why forest cover alone is an incomplete description of the region. Different habitats support different communities. A grassland or wetland should not be treated as empty ground merely because it lacks a tall canopy.

UNESCO's World Heritage property consists of selected component sites. The broader biodiversity hotspot and the inscribed property are related geographic concepts with different boundaries. A place can be within the hotspot without being one of those World Heritage components.

4. Sundaland: India's Nicobar connection

Sundaland is a wider Southeast Asian hotspot whose Indian portion is the Nicobar Islands. The name should not be shortened to the Sundarbans, which is a different place. Nor should Andaman and Nicobar be merged simply because they share an administrative name.

NITI Aayog's 2026 publication states the two island groups' different hotspot associations. The administration's forestry plan also describes linked island habitats, including evergreen forests, beaches, creeks, mangroves and marine environments. That ecological setting is broader than the terrestrial criteria used to define the global hotspot itself.

For a closer look at coastal systems, read mangroves in India. A coastal habitat's importance does not depend on its appearing as a separate name in the four-hotspot list.

How to read a hotspot map without overinterpreting it

Open the labelled map published by Conservation International. Its associated boundary dataset is version 2016.1, the version linked from Conservation International's current explainer when this guide was checked. The dataset date describes the mapping resource; it is not a claim that every habitat was surveyed in 2026.

For a study or project, record the boundary source and version. Then compare it with the actual site outline, habitat evidence and relevant conservation designations. Do not interpret a coarse regional edge as a surveyed property line.

Consider an imaginary forest patch near a hotspot boundary. Whether it falls inside the polygon answers one regional screening question. Which species use it, whether its habitat is degrading and what local people need remain separate questions. A point outside the polygon does not make those questions disappear.

Our habitat mapping guide explains how to move from broad regional context to a useful site map. Ecosystem services adds another perspective: how the ecological system contributes to people's lives.

Questions about India's biodiversity hotspots

Does India have three hotspots or four?

The current recognised list overlapping India has four. Check whether a shorter list omitted Nicobar or used an older regional classification. Keep the four full names beside the date and source.

Are hotspots the same as national parks?

No. A hotspot is a broad conservation-priority region. A national park is a designated area with its own boundary and management. The hotspot label alone does not establish the designation of a specific parcel.

Is land outside a hotspot less worth protecting?

No. The framework selects regions meeting particular endemism and loss thresholds. Conservation International explicitly supports protecting nature beyond hotspots. Local wetlands, grasslands and other habitats can matter even when they are absent from this list.

Sources and current global count checked on 8 October 2026. Older national reports are used for regional explanation, with their historical totals kept separate. The cover is an illustrative tree photograph, not a mapped hotspot location.