The sanctuary covers an area of .77 km2 (0.30 sq mi).

[1] The sanctuary is built around Periyakulam lake surrounded with bushes.

More than 20,000 birds visit during the migration period from November to March.

The sanctuary features thousands of birds coming from various countries, some of which can be easily identified.

The bird species include bar-headed goose, black-tailed godwit, barn swallow, woolly-necked stork, Eurasian spoonbill, greater spotted eagle, blue-tailed bee-eater, little stint, spot billed pelican, purple swamphen, and yellow wagtail.