India, July 20 -- Checklists accounting for more than 100,000 birds and 221 bird species in Delhi have been submitted on the eBird portal, following two birding sessions in the first half of the year, birders associated with creating the Delhi Bird Atlas said on Saturday.

The Delhi Bird Atlas is a collaborative initiative aimed at documenting the city's bird species and is led by Delhi's birdwatching community and supported by the forest department.

"Birding sites were selected at random within the Delhi region. Birding was done in January 2025 and then again in May-June 2025," said Pankaj Gupta, a birder involved in the census.

For the census, Delhi was divided into grids of 6.6sqkm, with each grid further split into quadrants of 3.3s...