Birds - 12 species are known to breed in the park: Spanish Sparrow, Tree Sparrow, Tawny Pipit, Zitting Cisticola, Spectacled Warbler, Sardinian Warbler, Cetti's Warbler, Short-toed Lark, Corn Bunting, Blue Rock Thrush (the Maltese National Bird), Barn Swallow and Yelkouan Shearwater. Seasonal visitors include several migratory species.
Mammals in the park include the Algerian Hedgehog, various bat species, the Weasel and the Wild Rabbit.
Reptiles on site are represented by the Mediterranean Chameleon, Ocellated Skink, Turkish and Moorish Gecko and Western Whip Snake.
Invertebrates are well represented with a rich diversity, and include some endemic insects such as the Maltese Swallowtail and endemic molluscs such as Muticaria macrostoma, Trochoidea spratti and Tudorella melitense.