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Bihar, pronunciation is a state in eastern India. Bihar is the 12th largest state in terms of geographical size 38,202 sq mi (99,200 km˛) and 3rd largest by population. Close to 85 per cent of the population lives in the rural countryside. Almost 58 per cent of Biharis are below the age of 25, which is the highest in India. Bihar lies mid-way between the humid West Bengal in the east and the sub humid Uttar Pradesh in the west which provides it with a transitional position in respect of climate, economy and culture. It is bounded by the country Nepal in the north and by Jharkhand in the south. The Bihar plain is divided into two unequal halves by the river Ganga which flows through the middle from west to east. Bihar has notified forest area of 6,764.14 km˛, which is 7.1 per cent of its geographical area. Hindi and Urdu are the official languages of the state, whilst the majority of the people speak one of the Bihari languages (once considered to be dialects of Hindi) - Bhojpuri, Magadhi, Maithili or Angika. Ancient Bihar, known as Magadha, was a center of power, learning and culture in ancient and classical India. From Magadha arose India's first empire, the Maurya empire as well as one of the world's greatest pacifist religion, Buddhism. Magadha empires, notably under the Maurya and Gupta dynasties, unified large parts of South Asia under a central rule. Its capital Patna, earlier known as Patliputra, was an important center of Indian civilization.

Geography: Bihar is mainly a vast stretch of very fertile flat land. It is drained by the Ganges River, including northern tributaries Gandak and Koshi originating in the Nepal Himalayas and the Bagmati originating in the Kathmandu Valley that regularly flood parts of the Bihar plains. The total area covered by the state of Bihar is 94,163 km˛. the state is located between 21°-58'-10" N ~ 27°-31'-15" N latitude and between 82°-19'-50" E ~ 88°-17'-40" E longitude. Its average elevation above sea level is 173 feet (53 m). The Bihar plain is divided into two unequal halves by the river Ganga which flows through the middle from west to east. Other Ganges tributaries are the Son, Budhi Gandak, Chandan, Orhani and Falgu. The Himalayas begin at foothills a short distance inside Nepal but influence Bihar's landforms, climate, hydrology and culture. Central parts of Bihar have some small hills, for example the Rajgir hills. The Himalayan Mountains are to the north of Bihar, in Nepal. To the south is the Chota Nagpur plateau, which was part of Bihar until 2000 but now is part of a separate state called Jharkhand. Bihar has notified forest area of 6,764.14 km˛, which is 7.1 per cent of its geographical area.

Bihar is mildly cold in the winter (the lowest temperatures being around 5 to 10 degrees Celsius; 40 to 50 degrees Fahrenheit). Winter months are December and January. It is hot in the summer (with average highs around 35-40 Celsius; 95-105 Fahrenheit). April to mid June are the hot months. The monsoon months of June, July, August, and September see good rainfall. October & November and February & March have pleasant climate.

Bihar has notified forest area of 6,764.14 km˛, which is 7.1 per cent of its geographical area. The sub Himalayan foothill of Someshwar and Dun ranges in Champaran district another belt of moist deciduous forests. These also consists of scrub, grass and reeds. Here the rainfall is above 1,600 mm and thus promotes luxuriant Sal forests in the favoured areas. The hot and dry summer gives the deduous forests. The most important trees are Shorea Robusta (Sal), Shisham, Cedrela Toona, Khair, and Semal. This type of forests also occurs in Saharsa district and Purnia district. Shorea Robusta (sal), Dispyros melanoxylon (kendu), Boswellia serrata (salai), Terminalia tomentose (Asan), Terminalia bellayoica (Bahera), Terminalia Arjuna (Arjun), Pterocarpus Marsupium (Paisar), Madhuca indica (Mahua) are the common flora across the forest of Bihar.

The Ganges River dolphin, or “susu” occur in the Ganga and Brahmaputra, south Asia’s largest river systems. It can now be considered amongst the most endangered mammals of the region.

The Ganges River dolphin ranges from 2.3 to 2.6 meters in length. The tail fluke is on average 46 cm in width. females are larger than males. The color of this dolphin varies from lead-colored to black. The undersides are lighter in color. The rostrum is 18 to 21 cm in length and the forehead is steep and rises abruptly from the base of the snout. The dorsal fin is rudimentary and ridge-like, and the ends of the pectoral fins are squared instead of tapered. The neck is visibly constricted and the blowhole is a longitudinal slit. There are 28 to 29 teeth on either side of the jaw. The eye and optic nerve of the Ganges river dolphin are degenerate. The eye lacks a lens and is therefore incapable of forming images on the retina. However, it functions in light-detection. It is believed that the lack of a true visual apparatus in the river dolphin is related to its habitat; the water in which it lives is so muddied that vision in essentially useless.

Valmiki National Park, West Champaran district, covering about 800 km˛ of forest, is the 18th Tiger Reserve of India and is ranked fourth in terms of density of tiger population. It has diverse landscapes, sheltering rich wild life habitats and floral and faunal composition, with the prime pro tected carnivores.