hawaiian goose

spotted at houston zoo.
The Nene, also known as Nēnē and Hawaiian Goose, (Branta sandvicensis) is a species of goose endemic to the Hawaiian Islands. The official bird of the state of Hawaiʻi, the Nene is exclusively found in the wild on the islands of Maui, Kauaʻi and Hawaiʻi. The Hawaiian name Nēnē comes from its soft call.
The Nene evolved from the Canada Goose (Branta canadensis), which most likely migrated to the Hawaiian islands 500,000 years ago, shortly after the island of Hawaiʻi was formed.
The Nene is a medium-sized goose at 41 centimetres (16 in) tall. Although they spend most of their time on the ground, they are capable of flight, with some individuals flying daily between nesting and feeding areas. Females have a mass of 1.525–2.56 kilograms (3.36–5.6 lb), while males average 1.695–3.05 kilograms (3.74–6.7 lb), 11% larger than females. Adult males have a black head and hindneck, buff cheeks and heavily furrowed neck. The neck has black and white diagonal stripes. Aside from being smaller, the female Nene is similar to the male in colouration. The adult's bill, legs and feet are black. It has soft feathers under its chin. Goslings resemble the male, but are a duller brown and with less demarcation between the colours of the head and neck, and striping and barring effects are much reduced. The bill, legs and feet are the same as for the adult. Its strong toes are padded and have reduced webbing, an adaptation that allows it to swiftly traverse rough terrain such as lava plains.
The Nene is an herbivore that will either graze or browse, depending on the availability of vegetation. Food items include the leaves, seeds, fruit, and flowers of grasses and shrubs.