The erection mechanism of the ratite penis

Macroscopic features of the venous drainage of the reproductive system of the male ostrich (Struthio camelus)

(2012) M.Z.J. Elias et al.   ONDERSTEPOORT JOURNAL OF VETERINARY RESEARCH

SEASONAL CHANGES IN THE MALLARD'S PENIS AND THEIR HORMONAL CONTROL

(2010) E. O. HÖHN   PROCEEDINGS OF THE ZOOLOGICAL SOCIETY OF LONDON

Gross anatomical and histomorphological observations on the terminal rectum and the cloaca in the Ostrich Struthio camelus

(2009) C N Warui et al.   OSTRICH

Explosive eversion and functional morphology of the duck penis supports sexual conflict in waterfowl genitalia

(2009) P. L. R. Brennan et al.   PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES

Independent evolutionary reductions of the phallus in basal birds

(2008) Patricia L. R. Brennan et al.   JOURNAL OF AVIAN BIOLOGY

Phylogenomic evidence for multiple losses of flight in ratite birds

(2008) J. Harshman et al.   PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA