The Site is a vast National Park, encompassing an exceptional diversity of wetlands, with as many as 17 wetland types, including mudflats, intertidal forested wetlands, mangrove areas, swamp forests, rivers and creeks, and permanent freshwater springs. This diversity of habitats supports an extraordinary number of species, including nearly 2,000 plants, more than one-third of Australia's birds (271 species), approximately one-quarter of its land mammals (77 species), 60 fish species, and over 130 reptiles and 27 frog species. The wide variety of aquatic habitats, ranging from turbid river systems to shallow inshore waters, supports species with different ecological needs, from river sharks adapted to sediment-rich waters to numerous fish species that rely on the Site for spawning and nursery grounds. As well as supporting many characteristic Australian species, the Site is also home to unique biodiversity, including regional endemics such as the endangered Kakadu goby (Egglestonichthys ulbubunitj), the Jabiru toadlet (Uperoleia arenicola), the Arnhem land bamboo (Bambusa arnhemica), and the yellow chat subspecies, Epthianura crocea tunneyi. The Site’s cultural heritage is equally significant, with its long association with the Aboriginal people of the region recognized through its World Heritage listing. Ancient rock paintings and archaeological sites found within the Site reflect thousands of years of human history. Together, its remarkable wildlife, landscapes, and cultural heritage make the Site a significant tourism destination. Invasive species pose an ongoing threat, and continuous management interventions are implemented to control their impacts.