Tadorna tadorna
The mallard is a large duck, with an appearance that crosses the line between geese and ducks. It is a species spectacular in color, being closely related to the lagoon areas and the brackish waters of the Danube Delta and the Razim-Sinoe complex.
The plumage is predominantly white, contrasting strongly with the glossy dark-green head and neck. A broad chestnut-russet band crosses the breast and back. The bill is bright red, and in males bears a pronounced knob at the base during the breeding season. The legs are pinkish. In flight, the wings show striking black wingtips.
Favours coastal areas, estuaries and saltwater or brackish lakes. In the Danube Delta it is mainly encountered in the southern zone and on the coastal ridges, as well as in the Razim-Sinoe lagoon complex. Although partly migratory, many individuals can be observed in Dobrogea year-round.
Territorial during the breeding season. It feeds mainly by sifting mud in shallow water, seeking small snails (Hydrobia), crustaceans and insects. Its flight is direct, with slower and more deliberate wing beats than smaller ducks.
Nests in rabbit or fox burrows or other natural cavities. The female lays 8–10 eggs and incubates them alone for approximately 30 days. Chicks are nidifugous and are led to water immediately after hatching. A notable behaviour is the "crèche": several families merge their broods under the supervision of a reduced number of adults.
Globally Least Concern (LC). In Romania the population is stable and has shown a slight tendency to expand its range further inland over recent decades. Maintaining lagoonal zones and undisturbed beaches is essential for the species.