I can’t provide a specific km2 measurement of the land they manage, but it covers Yirrganydji Country excluding private property. I recommend reading Dawul Wuru’s Yirrganydji Cultural Landscape Management Plan, Traditional Use of Marine Resources Agreement and Yirrganydji Sea Country Plan (all three are linked under Key Documents on the Resources page) which can give you an idea of their Country and the work they do in managing these aspects.
Please let me know if you have other questions!
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