Great spotted kiwis are the largest of the kiwis; the male is tall, while the female is tall. Bill length ranges from , while weight ranges between for males and for females. The body is pear-shaped, while the head and neck is small with a long slender ivory bill.BirdLife International (2008)(a) The great spotted kiwi, along with the other kiwi species, is the only bird with nostrils at the end of its bill. The eyes are small and do not see well, as it relies mostly on its sense of smell. The legs are short, with three toes per foot. It has a plumage composed of soft, hair-like feathers, which have no aftershafts. The plumage can range from charcoal grey to light brown. They have large vibrissae around the gape, and they have no tail, only a small pygostyle. The common name of this bird comes from black spots on its feathers. They use their powerful legs and claws for defence against predators like stoats or ferrets. Kiwis are flightless birds, and hence lack hollow bones, lack a keel to which wing muscles anchor, and have tiny wings. This species also has a low body temperature compared to other birds. Average lifespan is 30 to 40 years.
