Keas are also found in the park above the bush line, but equally in forested areas and down to Arthur's Pass Village where they are attracted by human activity. The forests provide habitat for a diversity of birds. Tuis, kakas and New Zealand pigeons are more common in the western forests, but other species such as yellow-crowned parakeets, yellowheads and riflemen may be more numerous on the eastern side. Other species of forest birds present in the park include bellbirds, grey warblers, silvereyes, brown creepers, tomtits, and moreporks. New Zealand falcon exists in the park in small numbers, and the great spotted kiwi is present on both sides of the divide.
Riverbeds provide habitat for a variety of species.
Pipits, paradise shelducks and Australasian harriers live there throughout the year. In addition, the riverbeds attract migrant birds such as South Island oystercatchers, black-fronted terns, banded dotterels and Canada geese. Birds of the streams and lakes include grey ducks, black teals and black shags. Blue ducks exist in small numbers in the remoter mountain streams. See also Native birds of New Zealand Introduced animals Red deer, chamois and opossum are established in the park, while Himalayan thar is rarely seen.