European Herring Gull

About

The European Herring Gull is a large and widespread gull species found across much of the Northern Hemisphere. It is a highly adaptable and opportunistic feeder, often associated with coastal areas, urban environments, and agricultural lands. Known for its distinctive calls and robust build, it is a familiar sight in many parts of its range.

Size & lifespan

Length

55-67 cm

Wingspan

138-150 cm

Weight

750-1500 g

Lifespan

Up to 30 years in the wild, typically 10-15 years.

Diet

Omnivore

Physical characteristics

Plumage

Adults have a white head, neck, underparts, and tail. The back and upperwings are pale grey. The wingtips are black with prominent white 'mirrors' (spots).

Beak shape

Strong, slightly hooked yellow bill with a distinctive red spot on the lower mandible (gonys spot).

Eye color

Pale yellow with a red orbital ring.

Leg color

Pinkish-flesh colored.

Distinguishing features

Large size, pale grey back, yellow bill with red spot, pink legs, and black wingtips with white mirrors. The red spot on the bill is pecked by chicks to stimulate regurgitation of food.

Juvenile appearance

Juveniles are mottled brown and grey, with a dark bill and dark eyes. They gradually acquire adult plumage over four years, passing through several intermediate stages. First-winter birds are heavily mottled brown, second-winter birds show more grey on the back, and third-winter birds are largely grey and white but still retain some brown in the wings and tail.

Seasonal changes

Adults show very little seasonal plumage variation. The red orbital ring may become slightly more prominent during the breeding season.

Sexual dimorphism

Males are generally slightly larger and heavier than females, but plumage is identical.

How to identify

1. 1

   Size and Shape

   Look for a large, robust gull with a powerful build and a relatively flat-topped head.

2. 2

   Plumage (Adult)

   Note the pale grey back and upperwings contrasting with white underparts. The black wingtips with prominent white 'mirrors' are key.

3. 3

   Bill

   Observe the strong yellow bill with a distinct red spot on the lower mandible. This is a crucial field mark.

4. 4

   Legs

   Check for pinkish-flesh colored legs. This distinguishes it from yellow-legged gulls.

5. 5

   Eye

   Pale yellow eye with a red orbital ring.

6. 6

   Vocalizations

   Listen for its characteristic loud, 'laughing' calls, especially the 'kyow-kyow-kyow-kyow-kyaaaah' series.

7. 7

   Juvenile Plumage

   Young birds are heavily mottled brown and grey. Note the dark bill and eyes, and the gradual transition to adult plumage over several years.

Habitat & range

Biomes

Coastal areas, estuaries, urban environments, agricultural land, landfills, inland lakes, and rivers.

Geographic range

Breeds across Northern Europe, Scandinavia, and parts of Russia. Winters across Western and Southern Europe, North Africa, and the Middle East. Also found in North America (though often considered a separate species, American Herring Gull, Larus smithsonianus, by some authorities).

Elevation range

Primarily sea level to low elevations, but can be found inland at various altitudes, especially near human settlements or large bodies of water.

Preferred environments

Rocky coasts, sandy beaches, cliffs, islands, harbors, fishing ports, city centers, parks, reservoirs, and cultivated fields.

Behavior

Activity time

Diurnal, though they may forage at night under artificial light or during full moons.

Feeding habits

Highly opportunistic and omnivorous. Diet includes fish, crustaceans, mollusks, insects, eggs and chicks of other birds, small mammals, carrion, offal, discarded human food, and berries. They forage by scavenging, surface-seizing, shallow-diving, and kleptoparasitism (stealing food from other birds).

Social behavior

Highly social, especially outside the breeding season, forming large flocks at roosts and feeding sites. Breeds in colonies, sometimes numbering thousands of pairs.

Flight pattern

Strong, direct flight with powerful wingbeats. Also capable of soaring and gliding, especially in coastal updrafts. Often seen hovering or circling over food sources.

Migration pattern

Northern populations are migratory, moving south and west for the winter. Southern populations are largely resident or undertake short-distance dispersal. Juveniles often disperse further than adults.

Territoriality

Highly territorial during the breeding season, defending nesting sites aggressively. Outside breeding, they are less territorial, often feeding in communal areas.

Breeding & reproduction

Breeding season

April to July, with peak egg-laying in May.

Nesting habits

Nests are typically built on cliffs, rocky outcrops, islands, sand dunes, or increasingly, on rooftops and other urban structures. The nest is a bulky scrape lined with vegetation, feathers, and debris.

Clutch size

2-4 eggs

Egg description

Typically 2-4 (usually 3) eggs, olive-brown to greenish-blue, heavily blotched and spotted with dark brown or black. Average size is about 70 x 50 mm.

Incubation period

28-30 days, incubated by both parents.

Fledging period

35-40 days after hatching. Young are semi-precocial, leaving the nest shortly after hatching but remaining dependent on parents for food.

Parental care

Both parents share incubation duties and care for the chicks, feeding them regurgitated food until they fledge and for some time thereafter.

Where to find

Field tips

1. Observe Feeding Behavior. Watch for their opportunistic feeding habits – scavenging, following fishing boats, or even snatching food from unwary picnickers.
2. Listen for Calls. Their loud and distinctive calls are often the first indication of their presence, especially in coastal or urban settings.
3. Study Age Plumages. Pay attention to the different plumages of juveniles and subadults, as they can look quite different from adults and from each other.
4. Check Leg Color. Leg color is a crucial distinguishing feature from similar species like the Yellow-legged Gull or Lesser Black-backed Gull.

Similar species

Quick facts

Scientific Name:

Larus argentatus

Family:

Laridae

Diet:

Omnivore

Conservation Status:

Least Concern

Average Lifespan:

10-15 years

Wingspan:

138-150 cm

Fun facts

• The red spot on the bill of adult European Herring Gulls acts as a target for chicks, which peck at it to stimulate the parents to regurgitate food.
• European Herring Gulls are highly intelligent and adaptable, capable of learning complex behaviors, such as dropping shellfish onto hard surfaces to break them open.
• Despite their commonality, the taxonomy of 'Herring Gulls' is complex, with various subspecies and closely related species (like the American Herring Gull) often being re-evaluated and split by ornithologists.
• They are known for their bold and sometimes aggressive behavior, especially when competing for food, and have successfully adapted to living alongside humans in urban environments.

Scientific classification

Kingdom

Animalia

Phylum

Chordata

Class

Aves

Order

Charadriiformes

Family

Laridae

Genus

Larus

Species

Larus argentatus

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