par PP » Ven Oct 17, 2008 8:24 pm
Je suis intéressée à savoir aussi. Il y a la race nominale Poicephalus Gulielmi Gulielmi et trois sous-espèces.
Un peu de littérature anglaise prise d'un site.
Il y a un droit d'auteur donc je pense que je dois le citer.
© 1996 African Parrot Society
Last updated: May 2, 1996
Poicephalus gulielmi gulielmi - The nominate race. This generally is a darker green and is stockier than the other subspecies, with a larger beak. Comes from Central Africa ranging from Cameroon, Angola east to south west Uganda. Can be distinguished by its dark wing feathers which could be described as practically "black" in some cases, because of only, the small green margins. A large amount of red / orange on the forehead extending into the crown , also on the thighs and fore edges of the wings in large areas.
Poicephalus gulielmi fantiensis - Distinguishable from the other two subspecies by being smaller, lighter in color but most noticeable, the forehead, crown, thighs and edges of wings are marked in a definite orange not orange / red, as in the nominate. Sometimes fading to yellow at the crown. Some specimens have a yellow "wash" on the abdomen. The distribution of this bird is West Africa from Liberia eastwards to Ghana along the Ivory Coast.
Poicephalus gulielmi massaicus - Similar size to the nominate but a sleeker bird with a smaller more slender beak. Tending to lack color on the head until adult plumage. In adult plumage it is much paler with less red / orange on the forehead, usually just a small band across the front of the head, not extending to the crown, and only small amounts of color on the wings and thighs. Also the backs of its wings have larger green margins so does not give the same nearly black appearance as in gulielmi. Its range is in East Africa from Southern Kenya to Northern Tanzania.
Poicephalus gulielmi permistus: This is supposed to be an intermediate between Poicephalus gulielmi gulielmi and Poicephalus gulielmi massaicus. But no examples of this have been identified in the UK. Or any that I know of, anywhere else.
Lilou, (Youyou du Sénégal), Creton (Gris du Timneh), Caesar (Gris du Gabon)
