Eastern Himalayas

The Eastern Himalayas are a beautiful and important mountain region. They stretch from eastern Nepal across Northeast India, Bhutan, the Tibet Autonomous Region to Yunnan in China and northern Myanmar. This area has many different plants and animals, making it a special place for nature.

The weather here is strongly affected by the monsoon of South Asia between June and September. This brings lots of rain, helping forests and rivers grow. Because of this special mix of climate and geography, the Eastern Himalayas hold many different kinds of life. Scientists call this a biodiversity hotspot. This means it is very important for protecting unique plants and animals.

The Eastern Himalayas also have rich biocultural diversity. This shows how people and nature live together in this stunning landscape.

Geology

The Eastern Himalayas have an interesting history and many special landforms. In the southwest is the Singalila Ridge. It is part of the high lands in Nepal and reaches into Sikkim, India, and Bhutan. The landscape here helps plants and animals live.

The Buxa range in Bhutan has very old rocks. Over millions of years, these rocks were worn down, and some types disappeared. But limestone and coal can still be found in some places. The highland rocks are mostly sandstones from a very old time, with some limestones and shales. In the middle of the mountains, you can see even older rocks like slates and gneiss.

Long ago, much of this area was covered by a shallow sea. Chalk formed from the tides. Later, new rocks formed, and many mountains rose up. The Himalayas were made when the India Plate pushed into the Eurasian Plate, and this is still happening, making the mountains higher.

Climate

The climate in the Eastern Himalayas is warm and wet all year, especially in the lower areas. Summers are hot, starting in April and peaking in June, with average temperatures around 20 °C (68 °F). The region gets a lot of rain, about 10,000 mm (390 inches) each year, making it much wetter than the Western Himalayas.

In some valleys, like those of the Rangeet, Teesta, and Chumbi, winter rain often falls as snow, which helps keep temperatures lower during that time of year. The northeast monsoon is the main influence on the weather here.

Agriculture

Farming in the Eastern Himalayas changes depending on the location. In high areas, the soil is special, and people build steps on hillsides to keep water. This helps them grow crops in the spring. For a long time, people here have often moved their crops to new land, hunted, fished, and traded goods instead of using money. Because of this, they haven't grown enough food to meet all their needs, and life has stayed simple. People also use plants from nature and some they grow for food and medicine.

Main article: shifting cultivation

Political divisions

The Eastern Himalayas are in several countries. These areas include parts of Nepal, Darjeeling Sub-Himalaya, Sikkim (Indian), Assam Sub-Himalaya, Bhutan, Arunachal Pradesh, and Garhwal/Kumaon in India. Each area has its own special landscape and culture.

Wildlife

The Eastern Himalayas have many plants and animals, including some that are rare and found only there. There are over 10,000 types of plants, 240 kinds of mammals, and 750 types of birds in this area.

Wildlife in Nepal includes the snow leopard, Indian rhinoceros, Asian elephant, and water buffalo. The forests along three major rivers—the Ghaghara, Gandaki River, and Koshi River—are full of life and support many butterfly species and 8% of the world's birds. Protecting these wild spaces is very important for keeping the Earth healthy.

The most varied cloud forest grows in India and China between 2,000 and 3,300 meters above sea level. Lower down, tropical rainforests cover the slopes up to 900 meters. Higher up, grassy areas called wet páramo stretch to 4,500 meters, where snow and ice can be found. Animals like the Asian black bear, Himalayan vulture, and small mountain creatures called pikas live in these high places. In the lower forests, you can find monkeys such as the Arunachal macaque and Rhesus macaque, along with colorful sunbirds and pheasants. The wetlands in the Himalayas are also rich with many different species.

Bhutan's national flower is the blue poppy, known scientifically as Meconopsis gakyidiana. For many years, people thought it was a different kind of poppy, but scientists later learned it was the same. They think this happened because some plants in the Himalayas can mix and create new types.