The presence of the rare bird species Black-headed Ibis in large numbers in the salt pans (uppul areas) of Thoothukudi district has drawn significant attention from bird watchers and environmental enthusiasts.

The Black-headed Ibis, characterised by its elegant white plumage, black head, and long curved beak, is listed as a "Near Threatened" species in Asia by the International Union for Conservation of Nature. It is predominantly found in wetlands, riverbanks and salt pans, where it feeds on fish, insects and other small aquatic creatures.