The Census data shows the blackbuck population rising from 61 in 2020-21 to 100 in 2023-24.
The spotted deer population is also increasing, signalling a broader ecological revival within the park.
The Guindy National Park is one of the few protected areas in the heart of the Chennai city and provides a refuge for both spotted deer and blackbucks.
Blackbucks, in particular, depend on open grasslands to survive.
A long-neglected parcel of land within Guindy National Park is set to be restored.
It is known as the Polo Ground; the area has since become overrun with invasive plant species.
Despite its condition, it remains an important habitat for blackbucks.