Sika deer
The invasive house mouse has a significant population within the park. There is rich native bird life in the forest including the rare North Island kokako and the kaka, kakariki, kuku (kereru, a native pigeon), and North Island robin. Sika deer have been shot or sighted within the confines of the park, believed to be an illegal liberation. Pigs are present, and of the at least eleven pest species that co-exist within the park, possums and goats are subject to management operations.