Pagaldia river- A tributary of the river Brahmaputra

Pagaldia river

The Pagaldia river is a major tributary of the river Brahmaputra which originates in the Angsi Glacier, located on the northern side of the Himalayas in Burang County of Tibet as the Yarlung Tsangpo River. The Brahmaputra River is a precious gift of Nature to India and especially to its northeast region. The meaning of this gift becomes evident immediately when one considers the vastness of water resources which the Brahmaputra River basin possesses. 

The Pagaldia along with its sister tributaries viz. the Puthimari, Manas, Beki, Kujia, Champamati, Saralbhanga, Gadadhar, Chulibhangi and a few others meet the river Brahmaputra from the north. All these rivers except the Kujia, Gadadhar and Chulibhangi rivers have their origin in the Himalayas in Bhutan. There are also many important sub-tributaries and Borolia is a very notable river and a tributary of the river Pagaldia. A branch of the Pagaldia, called the Buradia, is joined successively by Mora Pagaldia, Kaldia, Pahumora, Palla and Tihu. All these rivers meet the river Beki. The river Beki flows to river Manas which discharges to the river Brahmaputra.

The Pagaldia is known to cause a lot of floods. The river having a short plain course swell up enormously in rainy season-and causes flood. The district of Nalbari is worst hit by the floods of Pagaldia and Mora Pagaldia.

Viewer's Choice: A Speckled wood butterfly (Pararge aegeria) sitting on a flower

A Speckled wood butterfly (Pararge aegeria) sitting on a flower

The Speckled wood belongs to the genus Pararge, which compromises 3 species : Pararge aegeria, Pararge xiphia, and Pararge xiphioides. The speckled wood occupies a diversity of grassy, flowery habitats in forest, meadow steppe, forest, woods, glades. It can also be found in urban areas alongside hedges, in wooded urban parks, and occasionally in gardens. Within its range the speckled wood typically prefers damp areas. It is generally found in woodland areas throughout much of the Palearctic ecozone. P. a. tircis is found in Northern and Central Europe, Asia Minor, Syria, Russia, and Central Asia, and the P. a. aegeria is found in southwestern Europe and North Africa. The growth and development of the speckled wood butterfly is dependent on the larval density and the sex of the individual. In the speckled wood butterfly females are monandrous; they typically only mate once within their lifetime. On the other hand, males are polygynous and typically mate multiple times.

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