Black-headed Gull

Characteristic chocolate-brown (not jet-black) hood extending to the nape; white eye crescents; body plumage pale grey (upperparts) and white (underparts); primary feathers with black tips.

White head with a prominent dark ear spot behind the eye; often a faint dark spot in front of the eye; bill tip often with a dark marking.

Upperparts patterned with brown; wings with brown coverts and a dark trailing edge; tail with a narrow black terminal band; legs and bill flesh-colored to yellowish.

Slight; males are on average slightly larger and heavier than females, though this is difficult to distinguish reliably in the field.

Conspicuous white wedge on the leading edge of the outer wing in flight; chocolate-brown hood in summer; red bill and red legs in adults.

Mediterranean Gull (Ichthyaetus melanocephalus): has a jet-black hood and pure white primary feathers. Little Gull (Hydrocoloeus minutus): significantly smaller, dark underwings.

Medium-length and slender; deep red with a dark tip in breeding plumage; paler red to orange-red in non-breeding plumage.

No song in the classical sense; colonies are characterized by loud, persistent clamor consisting of various call variants.

Hoarse, rasping 'kree-ar' or 'kwarr'; when excited, a short, rhythmic 'kek-kek-kek'.

Widespread across the entire Palearctic; from Iceland and the British Isles through Europe and Central Asia to Kamchatka.

Western and Southern Europe, North Africa, the Near East, India, and Japan; utilizes ice-free inland waters, coasts, and increasingly urban areas.

Partial migrant; Northern and Eastern European populations migrate southwest; Central European birds are often residents or short-distance migrants.

Inland waters such as lakes, ponds, bogs, and marshes; prefers islands or dense riparian vegetation (reeds); also in coastal lagoons and salt marshes.

Very versatile: arable land (often follows plows), meadows, landfills, sewage treatment plants, urban parks, and water bodies.

Untidy heap of stalks, reeds, rushes, and aquatic plants; on solid ground, in sedge tussocks, or on floating vegetation.

Highly variable in color; usually olive-green, brownish, or bluish with irregular dark spots, dots, and scribbles.

Both parents incubate and feed the young; chicks are semi-precocial (staying near the nest site).

Predominantly animal-based: insects (especially chironomids), earthworms, small fish, crustaceans, and mollusks.

Opportunistic omnivore: anthropogenic waste, bread, fish, invertebrates, seeds, and grain.

Picking from the ground or water surface; shallow surface plunging; catching insects in flight; kleptoparasitism towards other birds.

Opportunistic search strategist; utilizes briefly available mass food sources (e.g., during mowing or plowing).

Highly social; breeds in colonies (up to 10,000 pairs) and forms large roosting and foraging flocks.

Synchronized flight maneuvers; forms dense flocks on fields or water bodies; often associated with Common Gulls or Northern Lapwings.

Loss of wetlands due to drainage; disturbance from recreational activities; predation by invasive species (raccoon, mink) and foxes; decline in insect biomass.

Strong regional decline in Germany (Red List 3), but globally stable and not threatened.

Protection and management of breeding colonies (e.g., through fencing); rewetting of bogs; creation of artificial nesting islands; visitor management.