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Haor and other Marshy lands:
These are formed by accumulation of water in the low-lying areas on the earth surface. Except rivers, ponds, and lakes the other marshy lands of Bangladesh may be classified into three categories: Haor, Baor and Beel.
A. Haor: Due to natural movements of the earth, beneath the earthcrust, some times changes take place on the earth surface. As a result earth
surface become deepen to form a basin like area where plenty of water is
reserved. This vast water reservoir is called Haor. The greater Sylhet district of Bangladesh is known as 'Haor Basin' region. The eastern region of Kishorganj and Netrokona are also included in Haor region. Some worth-mentioning Haors are Hakaluki, Tanguar Hayil, Dubriar Haor etc.
B. Baor : The horseshoe shaped water reservoirs, which are formed naturallydue to the change of river route, are known as Baor. There are several Baors in the southwestern region of Bangladesh. Among these some big ones are: Baro Baisdia. Choto Baisdia. Baluhar. Marjat. Joidia etc.
c. Beel : Water reservoir that originates by the side of the old river route iscalled Beel. There are many Beels in the greater districts of Bangladesh namely Rajshahi, Rangpur, Bogra, Pabna, Faridpur and Khulna. Among these, Chalan Beel, Patrail, Manda, Parul, Raktodoha. Dakatia, Gopalgonj Bakhra are prominent.
Almost throughout the year water remains present in the Haors, Baors and Beels, but in winter water become less and then paddy is cultivatad there. In some places there remain at least some water throughout the year.
Plants : Usually common aquatic plants are grown in aquatic environments ofthe Haor, Baors and Beels. Besides this, there grow specially reeds (Nalkhagra), Ikar, Hijal, Karoch, Gota, Gamar, Barun and wild roses. Thes are bushes of Hijal and Nalkhagra.
Animals : In these shallow water bodies there are different species of fisheslike Lata, Meni, Baim etc. and various kinds of animals like toad, frog, tortoise, water snakes, heron, crane, Kadakhocha Pakhi, kite, eagle and Pankouri etc.
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