The degree of leucism varies from partial in some birds to complete in others. However, some birds are not leucistic as it seems, but are affected by age-related progressive greying. These birds were photographed in Morocco over the years by different birders, they are listed below from the Anatidae to the Emberizidae. The list will be updated regularly.
Leucisme et d’autres aberrations de couleurs chez les oiseaux
Le degré de leucisme varie du partiel dans certains oiseaux au complet dans d’autres. Cependant, certains oiseaux ne sont pas leucistique comme il semble, mais sant affectés par le ‘grisonnement progressive’ lié à l’âge. Ces oiseaux ont été photographiés au Maroc au cours des années par différents observateurs, ils sont listés ci-dessous depuis les Anatidés jusqu’à les Emberizidés. La liste sera mise à jour régulièrement.
– Red-crested Nette rousse (Netta rufina): photographed at Sidi Boughaba by Said Mrigua in late October 2014.
– Common Coot (Fulica atra) photographed at the lagoon of Sidi Moussa by Ruth García Gorria for a month in October and November 2014.
– Slender-billed Gull (Chroicocephalus genei) photographed at Merja Zerga by Said Lahrouz on 26 October 2014.
– Partially leucistic Collared Pratincole (Glareola pratincola) photographed at Sebkha Bou Areg in July 2015 by Said Azaouaghe.
– Leucistic Little Ringed Plover (Charadrius dubius) photographed at Essaouira by Leander Khil in February 2012.
– A completely leucistic Whimbrel (Numenius phaeopus) observed in the tidal flats between Skhirat and Temara by Wolf Meinken in January 2011 (thanks Wolf for commenting in the leucistic Whimbrel blog).
– A partially leucistic Whimbrel photographed at the intertidal zone between El Jadida and Sidi Bouzid by Ruth García Gorria on 17 October 2014. When found again on 15 February 2015, the bird became much whiter after moult (compare the photos).
– Leucistic Yellow Wagtail (Motacilla flava) photographed at Oualidia lagoon by Benoît Maire and other GOMAC members on 16 November 2014.
– Black Wheatear (Oenanthe leucura) photographed at Oukaimeden (photos 2 & 3 in this link), by Thomas S. Lahlafi and Brahim Bakass in summer 2014.
– Black Wheatear photographed in the Atlas Mountains (photo 1 in this link) by Chris Smallbones in March 2015.
– Black Wheatear photographed near Midelt by Rachid El Khamlichi on 16 April 2013 (photo 7 below).
– Western Jackdaw (Corvus monedula) photographed near Smir wetland by Rachid El Khamlichi, Mohammed Karim El Haoua & Mohamed Amezian on 28 September 2014.
– A partially leucistic House Bunting (Emberiza sahari) photographed at Agdz village, Draa Valley, by Abdelhak Elbanak on 29 October 2012.
Many thanks to all the observers and photographers for their records. Special mention for Ruth García Gorria.