As one of the largest coastal forests in East Africa after Arabuko-Sokoke Forest, this reserve is rich in flora and fauna and hosts the highest density of African elephant in Kenya. Other animal species found in the area are Sable antelope, elephant shrew, bushy tailed mongoose and other small mammals like fruit bats. The forest is an important bird area and is endowed with forest birdlife while the grasslands hold localized species such as red-necked-Spur fowl, Croaking Cisticola and Zanzibar Red Bishop. The scenic Sheldrick Falls and the dense Mwaluganje Forest are also found here along with four campsites.
Include Endangered Sable Antelope, Elephants, Giraffes, Leopard, Genet, Civet cat, Hyenas, Waterbuck, Bush pig, Buffalo, African Bush Baby, Bushbuck, Coastal Black and white Colobus, Blue Duiker, Bush Duiker, Red Duiker, Greater Galago,Black-faced Vervet Monkey, Sykes Monkey, Serval cat, Black and Red Shrew, and Knob-bristled Suni Shrew.
111 bird species have been recorded, of which 22 are coastal endemic among them are: Ostrich Eagle, African Hawk; Falcon, Cuckoo; Guinea-fowl, Kenya Crested; Honey guide, Greater; Hornbill, Crowned; Quail, Blue; Sunbird, Uluguru, Python, Cobra, Lizard, and Gecko also Butterflies, mosquito and beetles.