[4] The wetlands have been identified by BirdLife International as an Important Bird Area because they support large numbers of nesting waterbirds when flooded.

Birds include the largest colony of straw-necked ibises (with up to 200,000 pairs), over 1% of the world populations of Australian pelicans and black-fronted dotterels, and small numbers of endangered Australasian bitterns.

[4] Yuwaalayaay (also known as Uallaroi, Yuwalyai, Euahlayi, Yuwaaliyaay, Gamilaraay, Kamilaroi, Yuwaaliyaayi) is an Australian Aboriginal language spoken on Yuwaalaraay country.

Giiguradjin (the northern Narran Lake area) was once the site of large gatherings (or yuurrma-y in the Uallaroi language) of Aboriginal people.

He was guided through the area by local Aboriginal people, and recorded following "well-beaten paths of the natives" as well as "pure water in great abundance" and "most excellent grass".