Patna Bird Sanctuary is a protected area in Uttar Pradesh's Etah district encompassing a lentic lake that is an important wintering ground for migrating birds.. It is situated near a town Jalesar which is also known as Ghungroo Nagari or Bell City. It was founded in 1991 and covers an area of 1.09 km2. With a lake area of only 1 km2, it is the smallest bird sanctuary in Uttar Pradesh. The water quality of the lake supports a wide range of avifauna during winter season. The entire lake area gets covered by profuse growth of macrophytic vegetation of water hyacinth and Potamogeton species during summers. About 200,000 birds of 300 different bird species frequent the sanctuary. More than 106 species of migratory and resident birds are known to have their resting habitats around the lake. The important aquatic birds inhabiting lake are: