Spread in a large area of about 80 sq kilometres, it is one the larger bird sanctuaries in the state of Uttar Pradesh. It is also one of the 94 bird sanctuaries across India recognized under the National Wetland Protection Scheme. Studies suggest that around 50, 000 waterbirds flock to the wetlands of Lakh-Bahosi between the months of December and March. A total of 250 bird species, native and migratory, are supported by the sanctuary’s distinctive ecosystem at different times during the year. The migratory species arrive from far flung regions in Siberia, Tibet, Europe, Central Asia and China.