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Evolution of the Apteryx mantelli, the North Island Brown Kiwi :, Kiwi…

- - - - 70 Million Years Ago
        
        78 Million Years Ago
        
        110 Million Years Ago
        
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        Neornithes (Modern Birds) is a subclass if the aves which contains all modern birds as we know them today. This is where flight and feathers stated to become more prevalent. A characteristic of this path of evolution is the adaptations for flight include fusion and reinforcement of lightweight bones and presence of a keeled sternum, which supports flight muscles (Neornithes Bird Taxon, n.d.).
        
        (Evolution Lab | NOVA Labs | PBS. (n.d.). https://www.pbs.org/wgbh/nova/labs//lab/evolution/research)
        
        The Palaeognathae class of birds is an important part of the kiwi's evolution. This class of species is the point where birds started to become better at running versus their flying counterparts. Most of these species continued to get larger. It does include a species that still retained its ability to fly called the tinamous.
        
        The order Struthioniformes branched off to become the modern day cassowaries, emus, kiwis, and rheas. This branch is found all over the world on multiple continents and islands showing how far they have spread.