* Small, round, flightless bird: Kiwis are small, with an average length of 20 to 50 centimeters (8 to 20 inches) and a weight of 1 to 3 kilograms (2 to 6.6 pounds). They are flightless, with vestigial wings that are hidden under their feathers.
* Long, thin beak: Kiwis have long, thin beaks that are used for probing the ground and searching for food. The nostrils are located at the tip of the beak, which helps them to detect scents.
* Feathers: The Kiwi's feathers are unique among birds, as they are hair-like and lack the barbs that give other birds their smooth, aerodynamic appearance. This gives them a shaggy, unkempt appearance.
* Strong legs and feet: Kiwis have strong legs and feet that are used for digging and walking. The feet are equipped with sharp claws that help them to grasp the ground and climb.
Behavioral features:
* Nocturnal: Kiwis are nocturnal, meaning they are active at night and sleep during the day.
* Solitary: Kiwis are solitary birds that live alone, except during the breeding season.
* Territorial: Kiwis defend their territories against other kiwis and predators.
* Omnivorous: Kiwis eat a variety of things, including fruits, insects, worms, and small vertebrates.
* Egg-laying: Kiwis lay large eggs relative to their body size. The female kiwi lays only one or two eggs per year, and the eggs are incubated by the male for about 80 days.
* Long-lived: Kiwis are long-lived birds, with some species living for up to 50 years.