Marbled Duck
Marmaronetta angustirostris
云石斑鸭
Introduction
Medium-sized duck (Marmaronetta angustirostris) in the family Anatidae. Formerly widespread across the Mediterranean region, now restricted to isolated populations in southern Spain, southern Italy, northwest Africa, the Levant, Mesopotamia (southern Iraq), and Iran (Shadegan Marshes being the world's most important site). Additional populations occur in Armenia, Azerbaijan, South European Russia, western India, and western China. Inhabits temporary and shallow fresh, brackish, or alkaline waters with densely vegetated shores in dry regions; also uses coastal lagoons, slow rivers, and reservoirs. Exhibits nomadic tendencies and disperses to the Sahel zone south of the Sahara in winter. The largest known winter concentration, approximately 40,000 birds, was recorded in Khuzestan, Iran in 2011. Classified as Near Threatened due to habitat destruction and hunting.
Description
A compact duck measuring 39–42 cm in length. Adults have pale sandy-brown plumage diffusely blotched with off-white markings, a distinctive dark eye-patch, and a shaggy head appearance. Females average slightly smaller than males but sexes are otherwise identical. Juveniles resemble adults but show more extensive off-white blotching. In flight, wings appear uniformly pale without a marked pattern or speculum on the secondaries.
Identification
Best identified by its unique pale sandy-brown coloration with diffuse off-white blotching and dark eye-patch against an otherwise plain head. The shaggy head feathering and unmarked pale wings in flight are distinctive. The combination of small size, pale plumage, and dark eye patch helps distinguish it from similar species. The lack of speculum differentiates it from many other dabbling ducks.
Distribution & Habitat
Current breeding range includes southern Spain, southern Italy, northwest Africa, the Levant, southern Iraq, Iran (especially Shadegan Marshes), Armenia, Azerbaijan, South European Russia, western India, and western China. Occupies temporary and shallow fresh, brackish, or alkaline waters with dense shoreline vegetation in otherwise dry regions; also uses coastal lagoons, slow rivers, and man-made reservoirs. Birds disperse to the Sahel zone south of the Sahara during winter. Largest winter concentrations occur in Khuzestan, Iran.
Behavior & Ecology
Feeds primarily by dabbling and up-ending in shallow water. Adults consume mainly seeds from Scirpus and Ruppia, supplemented by aquatic insect larvae, pupae, small crustaceans, and occasionally ants. Also eats aquatic plants such as Potamogeton. Uses a specialized gizzard for breaking down seeds and lamellae for filter-feeding on zooplankton. Young feed predominantly on invertebrates. Nests contain approximately 12 eggs in dense vegetation at the water's edge, either on the ground or occasionally among reeds. Gregarious at all seasons; small flocks form outside breeding season, though large winter concentrations occur.
Conservation
Classified as Near Threatened by the IUCN due to population decline from habitat destruction and hunting. The species is protected under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA). Formerly common across the Mediterranean, now restricted to fragmented populations at relatively few sites.
Culture
No significant cultural or folklore associations documented.
Source: Wikipedia · CC BY-SA 3.0
Taxonomy
- Order
- Anseriformes
- Family
- Anatidae
- Genus
- Marmaronetta
- eBird Code
- martea1
Distribution
Canary Islands and Mediterranean basin to far southwestern China
Data Sources
Species description from Wikipedia, licensed under CC BY-SA 3.0.
Taxonomy data from AviList 2025.