This is well illustrated by the case of the 2014 census, where visited sites reached their highest number (115 wetlands), but the wintering Ferruginous ducks were not at their highest numbers and their distribution did not exceed 18% of the total visited sites.
This model was applied to all the sites where wintering Ferruginous ducks were recorded.
However, wintering Ferruginous ducks are generally concentrated in the Northern part of Morocco, especially the North-West region, which hosted, during the last ten years, between 31 and 91% of the national population (Figure 3).
Some Ferruginous ducks winter in several wetlands that already have national or international conservation status (Table 3).
Meszaros, "Possible effects of nest predation on the breeding success of Ferruginous ducks Aythya nyroca," Bird Conservation International, vol.
The Ferruginous Duck Aythya nyroca (Guldenstadt, 1770) is a winter visitor and a breeding resident in Morocco [1, 2]; it winters regularly in the Northern part of the country, usually in small numbers, in comparison with Tropical Africa .
In Europe, the Ferruginous duck prefers shallow freshwater wetlands , generally rich in emergent vegetation , but it can occupy coastal ecosystems .
According to recent data , the Ferruginous duck's global population is estimated at 180.700-238.000 individuals.
In Morocco, the Ferruginous duck, previously represented by very few individuals permitting to classify it as endangered, became recently more common, but still in a vulnerable situation, knowing that its habitats are relatively fragile.
This study presents an analysis of the winter census data of the Ferruginous duck during the 1983-2017 period in Morocco.