The cult of Saivism has found expression in Bihar in a large number of Shiva temples and particularly on the districts bordering Nepal. North Bihar districts, namely, Champaran, Saran, Muzaffarpur, Darbhanga and Saharsa have got quite a few Shiva temples.
The influence of Nepal, where Saivism has a very great holds, is clearly one of the reason why there are so many Shiva temples in these boarder districts. Many of these Shiva temples are visited by thousands of pilgrims from Nepal.
The Singheshwar temple at the village Singheshwar in Saharsa district is one of the ancient Shiva temples in Bihar. It is visited by lakhs of pilgrims in the course of a year although it is not very easily accessible from the other parts of Bihar.
Most of the villages of Saharsa district remained water-logged for most of the year. There were hardly any long-distance roads and the pathways could be negotiated by bullock-carts only. Kosi floods frustrated the people and made them listless fatalists. Their songs, folk literature etc. evolved round the dreaded mother Kosi. Their children could not be easily married, as people in non-Kosi areas would not give their children in marriage, to parties in the Kosi region. Mothers would sing lullaby songs to the children that if they do not behave, Kosi mother would come and sweeps them away.
The writer has seen young children tied up to post oil the verandahs of huts by the Kosi River as no one knew when the Kosi flood would come. Kosi has been known to change her course quite a few times and has devastated thousands of acres of land. Kans and Pater, peculiar kinds of thick long grasses with rapidly spreading roots would grow and turn fertile fields into jungle patches harboring wild boar and deer.