Yamuna Biodiversity Park

Yamuna Biodiversity Park covers 457 acres along the Yamuna river front in Delhi. The Delhi Development Authority created it with technical help from the University of Delhi's Centre for Environmental Management of Degraded Ecosystems. Work started in 2005 on barren floodplains whose sodic soil made plant growth hard: researchers planted a particular grass that brought the soil's pH down from 10 to neutral, and reintroduced native species. Phase I restored 157 acres as two wetlands, grassland and forest, and Phase II, on the active floodplain, began in 2015.

Until 2004 the land held only mongooses, lizards and 31 kinds of birds. By 2019 it was home to around 1,500 plant and animal species, including native trees such as adina, sal, teak and hardwickia, and some 200 bird species. Its wetlands draw thousands of birds each year on migration from Europe, Siberia and Central Asia, and porcupines, small Indian civets, wild boar, 75 butterfly species and 10 snake species have been recorded.