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Large, flightless birds from Africa without a keel on the sternum.
A recent study proposed that the former treatment is wrong2: Instead, the tinamous should are now inserted into the middle of the groups included here with the ostriches as the basal group. That leads to a conclusion that either the tinamous regained the ability for flight from a flightless ancestor, or the ability to fly was lost independently in two or more lineages; the authors argue that the second interpretation is by far the most likely. Tinamous together with flightless birds have for a long time been seen as one fundamental group of birds, Palaeograthae; Neognathae contains the remainder of the living birds.
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Articles in category "Struthioniformes"
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