Karijini National Park encompasses an area of immense biological diversity, including vegetation ranging from grasslands to closed forests.
Common to most areas of the park are the hummock grasslands (Triodia species) with various open shrub layers (dominated by Acacia species) and tree layers (commonly Eucalyptus). However flora in the park includes over 500 species of native flora, including some rare species.
Visitors can also see Mulga (Acacia aneura) stands on flats and hill slopes, and Paperbark (Melaleuca leucadendra) forests in gorges.
From June to September each year the Pilbara’s wildflowers come into bloom, and many wildflowers can be seen within Karijini National Park, including purple mulla mullas and Karijini wattle.
The vegetation and landscape of Karijini provide habitat for a wide range of native fauna, including insects, amphibians, reptiles, birds and mammals. Visitors to the park may see species such as red kangaroos and euros, rock-wallabies and echidnas, and the park is also home to rarer species such as the bilby and the Pilbara ningaui.