Gaviota Cabecinegra

Identificación

The Mediterranean gull is slightly larger and bulkier than the black-headed gull with a heavier bill and longer, darker legs. The breeding plumage adult is a distinctive white gull, with a very pale grey mantle and wings with white primary feathers without black tips. The black hood extends down the nape and shows distinct white eye crescents. The sharp-tipped, parallel sided, dark red bill has a black subterminal band. The non breeding adult is similar but the hood is reduced to an extensive dusky "bandit" mask through the eye. This bird takes two years to reach maturity. First year birds have a black terminal tail band and more black areas in the upperwings, but have pale underwings.

Taxonomía

Nombre científico

Ichthyaetus melanocephalus

Autoridad

(Temminck, 1820)

Orden

Charadriiformes

Familia

Láridos

Género

Ichthyaetus

Distribución y hábitat

Formerly restricted to the Black Sea and the eastern Mediterranean this species has now expanded over most of Europe as far as Great Britain and Ireland, with 37 sites: 543–592 pairs in the United Kingdom in 2008, breeding in Scotland for the first time in 2023. In Ireland breeding has been recorded in at least four counties. Breeding has also occurred in Belgium, the Netherlands, Denmark, Sweden, Estonia, Switzerland, the Czech Republic, Hungary and the Balkans.<p>In winter, this bird migrates to Mediterranean and Atlantic coasts.

Área de cría

PAL : inland s Britain and e Spain to sw Russia, Ukraine and Azerbaijan

Área no reproductiva

coasts of e North Atlantic from s Ireland and Britain to Canary Is. (Macaronesia, w of nw Africa) and wc Africa; Black Sea, and throughout Mediterranean and associated seas

Migración

Complete migrants

Comportamiento

This gull breeds in colonies in large reed beds or marshes, or on islands in lakes; where its population is small, it nests in black-headed gull colonies. Like most gulls, it is highly gregarious in winter, both when feeding or in evening roosts. It is not a pelagic species, and is rarely seen at sea far from coasts.<p>The Mediterranean gull's feeding habits are much an opportunistic omnivore, eating fish, worms, insects, eggs, young birds, offal and carrion.<p>This is a noisy species, especially at colonies, with a nasal "yeah" call.

Conservación

The Mediterranean gull is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.

Tendencia poblacional

declining