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An omnivore, the kea feeds on more than 40 plant species, beetle larvae, grasshoppers, land snails, other birds (including shearwater chicks), and mammals (including sheep, rabbits and mice). [ 8 ] [ 33 ] [ 42 ] It has been observed breaking open shearwater nests to feed on the chicks after hearing the chicks in their nests. [ 43 ]
The sheep population on Mauna Kea eventually exceeded 40,000 in the 1930s, decimating the defenseless native plants including remaining silversword. [4] Feral sheep were then greatly reduced from 1936 to 1950 but protected until 1981 as sport game in the Forest Reserve lands, which overlap the original Mauna Kea silversword habitat.
Palila v. Hawaii Department of Land and Natural Resources was an ecological court case pertaining to the Palila and the Māmane-Naio ecosystem of Mauna Kea.The case stems from the introduction of goats and sheep onto Hawaiʻi island in the late 18th century, which became feral and damaged the local ecosystem.
The Kea is one of the few alpine parrots in the world, and includes carrion in an omnivorous diet consisting mainly of roots, leaves, berries, nectar and insects. Now uncommon, the Kea was once killed for bounty as it preyed on livestock, especially sheep. It only received full protection in 1986.
The trampled dead body of Scottish botanist David Douglas (discoverer of the Douglas fir) was found in 1834 in a bullock pit on Mauna Kea. Those traps were known for catching cattle, but the possibility of murder was considered in this case. [4] Feral cattle contributed significantly to the decline of many plant species in the Hawaiian Islands. [2]
Four breeds of sheep, in the illustrated encyclopedia Meyers Konversationslexikon. This is a list of breeds of domestic sheep. Domestic sheep (Ovis aries) are partially derived from mouflon (Ovis gmelini) stock, and have diverged sufficiently to be considered a different species. Some sheep breeds have a hair coat and are known as haired sheep.
unusual scree plants such as vegetable sheep, penwiper, Haast's scree buttercup, scree lobelia, and scree pea; native grasshoppers, wētā, cockroaches, lizards and butterflies; grassland birds such as kea, New Zealand falcon, and New Zealand pipit; forest birds such as tomtit, rifleman, and pipipi
The mainland species are the kea (Nestor notabilis), the New Zealand kākā (Nestor meridionalis), the kākāpō (Strigops habroptilus), and three species of kākāriki: the yellow-crowned parakeet (Cyanoramphus auriceps), the red-crowned parakeet (Cyanoramphus novaezelandiae) and the orange-fronted parakeet (Cyanoramphus malherbi).