| Titre : | An aberrantly coloured Hen Harrier Circus cyaneus in Middle Franconia, Bavaria |
| Auteurs : | Robert Pfeifer, Auteur ; Jacqueline Cromer, Auteur |
| Type de document : | Article |
| Dans : | Ornithologischer Anzeiger (52(1-2) AUG 2013) |
| Article en page(s) : | 89-90 |
| Résumé : | The mutation of this bird, observed in February 2013 near Weidenbach, Middle Franconia, is defined as "Brown", a qualitative reduction of eumelanin. The eumelanin synthesis is incomplete as the eumelanin is not fully oxidized. The phaeomelanin is unaffected. |



