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Flightless birds are birds that cannot fly, as they have, through evolution, lost the ability to. [1] There are over 60 extant species, [2] including the well-known ratites (ostriches, emus, cassowaries, rheas, and kiwis) and penguins. The smallest flightless bird is the Inaccessible Island rail (length 12.5 cm, weight 34.7
This is an accepted version of this page This is the latest accepted revision, reviewed on 3 February 2025. Extinct order of birds This article is about the extinct New Zealand birds known as moa. For other uses, see Moa (disambiguation). Moa Temporal range: Miocene – Holocene, 17–0.0006 Ma PreꞒ Ꞓ O S D C P T J K Pg N North Island giant moa skeleton Scientific classification Domain ...
With its long decurved bill and brown body, the curlew resembles the kiwi. So when the first Polynesian settlers arrived, they may have applied the word kiwi to the newfound bird. [11] The bird's name is spelled with a lower-case k and, being a word of Māori origin, normally stays as kiwi when pluralised. [12] [failed verification]
The tops of elephant bird skulls display punctuated marks, which may have been attachment sites for fleshy structures or head feathers. [18] Mullerornis is the smallest of the elephant birds, with a body mass of around 80 kilograms (180 lb), [16] with its skeleton much less robustly built than Aepyornis. [19]
G. newtoni was about 7 feet (2 meters) tall and weighed up to 529 pounds (240 kilograms). It belonged to the family Dromornithidae, a group of flightless birds known from fossils found in Australia.
This category includes both recently extinct and prehistoric flightless birds. Subcategories. This category has the following 6 subcategories, out of 6 total. ...
The basal metabolic rate of flighted species is much higher than that of flightless terrestrial birds. [34] But energetic efficiency can only help explain the loss of flight when the benefits of flying are not critical to survival. Research on flightless rails indicates the flightless condition evolved in the absence of predators. [35]
And it turns out the moa's closest relative is another chicken-sized bird called the tinamou, which lives - get this - in South America. Another twist: some of them can even fly.