Nagdaha is a lake in the Dhapakhel Village Development Committee (VDC) of Lalitpur District, in the Kathmandu Valley, Nepal.

During the rainy season the male serpent, widely spoken of in ancient scriptures and oral history of Kathmandu as a serpent king, makes a journey to the town of Panauti in order to participate in a festival.

There are more than 50 resident birds, including black kite, black drongo, cattle egret, Oriental magpie robin, common myna, large-billed crow, rose-ringed parakeet, Alexandrine parakeet, common kingfisher, white-breasted kingfisher, red-vented bulbul and owlets.

Some of the summer visitors are cuckoos, white-breasted waterhen, common moorhen, little grebe and greater painted snipe.

Whereas some of the winter visitors are Eurasian coot, ferruginous pochard, northern shoveler, mallard, gadwall and great cormorant.