Ornithologist Hem Sagar Baral said birds come to Nepal from countries including Siberia, Malaysia, Uzbekistan, Pakistan and China. Birds like various species of duck like Chakhewa, Suiropuchhre, Malak, Khadakhade, Bijula and Gairi are among the migratory birds that visit Nepal to avoid cold, he said. “It is found that birds migrate to the southern area from northern one to avoid cold.”

According to him, 100 of 150 species of birds that come to Nepal as visitors have arrived in Nepal this season so far. These birds would return from the south to the north after six months during the time of hatching, he said. These birds visit Nepal as during winter, the days are shorter and nights are longer in the north pole of the earth, and there is short of time for them to graze, he said.

Particularly, birds living in wetlands, grasslands, forests and farmlands visit Nepal during winter, it has been said. There are 892 species of birds across Nepal with 650 species in Chitwan alone.

Rapti, Narayani and Riu rivers that runs through the CNP and wetlands in the surroundings are good habitats for water birds while the CNP, buffer zones, parks and community forests are considered good areas for wandering.