citat: But their Stupidity is not less remarkable ; for, high as the rest of their Body is, if they hide their Head and Neck in a Bush, they think themselves altogether concealed. från; Plinius den äldre (50-70 e.Kr.) Natural History, översättning: Dr Philemon Holland av Naturalis Historia, 10:e boken, kap 1. The Nature of Birds.
Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood (2019) The eBird/Clements checklist of birds of the world: Version 2019 http://www.birds.cornell.edu/clementschecklist/download, läst 2019-08-11
doi.org
dx.doi.org
Robinson, Terence J.; & Matthee, Conrad A. (8 april 1999). ”Molecular genetic relationships of the extinct ostrich, Struthio camelus syriacus: consequences for ostrich introductions into Saudi Arabia.”. Animal Conservation "2" (3): ss. 165–171. doi:10.1111/j.1469-1795.1999.tb00062.x. ISSN1367-9430.
Robinson, Terence J.; & Matthee, Conrad A. (8 april 1999). ”Molecular genetic relationships of the extinct ostrich, Struthio camelus syriacus: consequences for ostrich introductions into Saudi Arabia.”. Animal Conservation "2" (3): ss. 165–171. doi:10.1111/j.1469-1795.1999.tb00062.x. ISSN1367-9430.
