Nene

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 (3.36–5.64 lb), while males average 1.695–3.05 kilograms (3.74–6.72 lb), 11% larger than females.[7] Adult males have a black head and hindneck, buff cheeks and heavily furrowed neck.[8] The neck has black and white diagonal stripes.[8] 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.[8] Its strong toes are padded and have reduced webbing, an adaptation that allows it to swiftly traverse rough terrain such as lava plains.[9]