I am familar with the feathersite article.If one looks closely,the website fails to use references and there are glaring ommisions and misspellings and what have you. Since you spent some time there perhaps you should post the photos. They say alot more than these words. I don't know the authors and didn't write their poorly documented papers. They look like poorly transcribed versions of the original Japanese work by non academics for non academics. I am familar with the Yamashina work and am currently working on translating some of the papers from the Yamashina institute of Ornithology on this specific topic. I find your tone a tad bit disrespectful. Working with the Japanese one learns something about honor and faith in a scientific setting. Barking loudly and clapping ones hands doesn't make for better science than hastily pasted references.I'll apologize for providing the forum with the two papers readily available that provide a good synopsis of the foundations of what is known about the migration of DIFFERENT SPECIES of domestic fowl and their hybrids throughout OCeania and the Pacific. My point is that until a researcher understands the basics of physiology and genetics of these oceanic fowls and their South American progeny one is in no position to chortle with such entitled presuppositional bias. Your statement that the prairie chicken and the chicken are identical is ridiculous. If one thinks about the manner in which fowl are killed, cooked and eaten and by whom it suddenly occurs to Most people why it is very difficult to determine which avian species were consumed in ancient history as Ive written earlier.
Pheasants and grouse have a different bone structure than Gallus and francolins.
Guineafowl have even denser bones than grouse but are more similar in physiology the bones that is with the gallus francolinus group.