Okhla Bird Sanctuary is located in

Okhla Bird Sanctuary is a bird sanctuary at the Okhla barrage over Yamuna River. It is situated in Noida, Gautam Buddh Nagar district, on Delhi - Uttar Pradesh state border and known as a haven for over 300 bird species, especially waterbirds. In 1990, an area of 3.5 square kilometres (1.4 sq mi) on the river Yamuna was designated a bird sanctuary by the Government of Uttar Pradesh under the Wildlife Protection Act, 1972. The site is located at the point where the river enters Uttar Pradesh.