http://www.ncbi.nlm.nih.gov/pubmed/22978587
http://www.stuff.co.nz/science/7867554/Feather-find-on-ostrich-like-dinosaurs
https://designeranimals.wikispaces.com/Ancient+Ostrich
http://www.skullsunlimited.com/record_order.php?id=21
http://blogs.scientificamerican.com/tetrapod-zoology/2014/03/18/ratites-and-tinamous-part-i/
http://www.bio.miami.edu/dana/160/160S13_5.html
http://www.ncbi.nlm.nih.gov/pubmed/19011988
http://animalsymbiosis.weebly.com/zebra-and-ostrich.html
http://en.wikipedia.org/wiki/Ratite
http://beautyofbirds.com/ratites.html
http://www.nhptv.org/wild/Struthioniformes.asp
http://en.wikipedia.org/wiki/Category:Struthioniformes
http://www.earthlife.net/birds/struthioniformes.html
http://dml.cmnh.org/2000Mar/msg00582.html
http://en.wikipedia.org/wiki/Ostrich
http://en.wikipedia.org/wiki/Little_spotted_kiwi
http://en.wikipedia.org/wiki/Greater_rhea
http://www.stuff.co.nz/science/7867554/Feather-find-on-ostrich-like-dinosaurs
https://designeranimals.wikispaces.com/Ancient+Ostrich
http://www.skullsunlimited.com/record_order.php?id=21
http://blogs.scientificamerican.com/tetrapod-zoology/2014/03/18/ratites-and-tinamous-part-i/
http://www.bio.miami.edu/dana/160/160S13_5.html
http://www.ncbi.nlm.nih.gov/pubmed/19011988
http://animalsymbiosis.weebly.com/zebra-and-ostrich.html
http://en.wikipedia.org/wiki/Ratite
http://beautyofbirds.com/ratites.html
http://www.nhptv.org/wild/Struthioniformes.asp
http://en.wikipedia.org/wiki/Category:Struthioniformes
http://www.earthlife.net/birds/struthioniformes.html
http://dml.cmnh.org/2000Mar/msg00582.html
http://en.wikipedia.org/wiki/Ostrich
http://en.wikipedia.org/wiki/Little_spotted_kiwi
http://en.wikipedia.org/wiki/Greater_rhea