European Herring Gull

About

The European Herring Gull is a large, robust gull species widely distributed across the North Atlantic. It is a highly adaptable and opportunistic feeder, often found in coastal areas, inland waters, and increasingly in urban environments. Known for its distinctive calls and often bold behavior, it is one of the most familiar gulls in its range.

Size & lifespan

Length

55-67 cm (22-26 in)

Wingspan

138-150 cm (54-59 in)

Weight

750-1600 g (1.7-3.5 lbs)

Lifespan

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

Diet

Omnivore, highly opportunistic. Diet includes fish, crustaceans, mollusks, insects, eggs and chicks of other birds, small mammals, carrion, offal, discarded human food, and berries.

Physical characteristics

Plumage

Adults have a pale grey back and upperwings, with black wingtips (primaries) that have white 'mirrors' (spots). The head, neck, underparts, and tail are pure white. Non-breeding adults may show some streaking on the head and neck.

Beak shape

Large, strong, slightly hooked yellow bill with a prominent red spot on the lower mandible (gonys).

Eye color

Pale yellow with a red orbital ring (in adults)

Leg color

Pinkish-flesh

Distinguishing features

Large size, pale grey mantle, black wingtips with white mirrors, yellow bill with red spot, pink legs. The red spot on the bill is a key feature for chicks to peck at, stimulating regurgitation of food by parents.

Juvenile appearance

Juveniles are mottled brown and grey, with a dark bill and dark eyes. They undergo several molts, gradually acquiring adult plumage over 3-4 years. First-winter birds are heavily mottled brown, second-winter birds show more grey on the back and a paler head, and third-winter birds are largely grey and white but still retain some dark markings and a darker bill.

Seasonal changes

Adults show minimal seasonal plumage changes. Non-breeding adults may have fine grey streaking on the head and nape, which is lost during the breeding season, making the head pure white.

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. It's one of the larger 'white-headed' gulls.

2. 2

   Mantle Color

   Observe the color of the back and upperwings. It should be a medium, pale grey. This distinguishes it from darker-mantled gulls like Lesser or Great Black-backed Gulls.

3. 3

   Wingtips

   Note the black wingtips (primaries) with distinct white 'mirrors' or spots. The extent and shape of these mirrors can be useful, though variable.

4. 4

   Bill Color and Markings

   Identify the strong yellow bill with a prominent red spot on the lower mandible. This red spot is a key field mark for adults.

5. 5

   Leg Color

   Check the leg color, which should be pinkish-flesh. This immediately rules out yellow-legged gulls.

6. 6

   Eye Color and Orbital Ring

   Adults have pale yellow eyes with a red orbital ring, which can be seen at close range.

7. 7

   Juvenile Plumage

   Young birds are heavily mottled brown and grey. Look for the gradual transition to adult plumage over several years, with a dark bill and dark eyes in the first year.

8. 8

   Vocalizations

   Listen for the characteristic loud, 'laughing' or 'long call' ('kyow-kyow-kyow') often given with the head thrown back. This is a very distinctive sound of coastal areas.

Habitat & range

Biomes

Coastal marine, freshwater wetlands, urban and suburban environments, agricultural lands.

Geographic range

Breeds across Northern Europe, Scandinavia, Iceland, and parts of North America (where it is often considered a separate species, American Herring Gull, Larus smithsonianus, or a complex of species). Winters south to the Mediterranean, North Africa, and the southern United States.

Elevation range

Primarily sea level to low elevations, though can be found inland along major rivers and lakes.

Preferred environments

Coastal cliffs, islands, beaches, estuaries, harbors, fishing ports, landfills, reservoirs, agricultural fields, and increasingly urban rooftops and parks.

Behavior

Activity time

Diurnal, though can be active at dawn and dusk, especially when foraging at landfills or fishing ports.

Feeding habits

Highly opportunistic and generalist. Forages by scavenging, surface-seizing, plunging, and kleptoparasitism (stealing food from other birds). Will drop hard-shelled prey (e.g., mollusks) onto hard surfaces to break them open. Often follows fishing boats and scavenges at landfills.

Social behavior

Highly social, especially outside the breeding season, forming large flocks at roosts and feeding sites. Breeds in colonies, sometimes very large ones.

Flight pattern

Strong, steady flight with powerful wingbeats. Can soar effortlessly on updrafts. Often seen gliding along coastlines or circling over food sources.

Migration pattern

Northern populations are migratory, moving south for the winter. Southern populations are largely resident or undertake shorter dispersal movements. Juveniles often disperse widely.

Territoriality

Highly territorial during the breeding season, defending nest sites vigorously against conspecifics and predators. Less territorial outside the breeding season, though feeding sites may be defended temporarily.

Breeding & reproduction

Breeding season

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

Nesting habits

Nests colonially on cliffs, islands, sand dunes, coastal marshes, and increasingly on urban rooftops. The nest is a bulky scrape lined with vegetation, feathers, and debris.

Clutch size

2-4 eggs

Egg description

Typically 2-4 eggs (most commonly 3), olive-brown to bluish-green, heavily spotted and blotched with dark brown or black. Average size is about 70 x 49 mm.

Incubation period

28-30 days, incubated by both parents.

Fledging period

35-40 days. Chicks are semi-precocial, leaving the nest within a few days but remaining dependent on parents for food for several weeks after fledging.

Parental care

Both parents share incubation duties and care for the chicks, feeding them regurgitated food. Parental care extends for several weeks after fledging.

Where to find

Field tips

1. Observe Behavior. Watch their feeding habits; their opportunistic scavenging and kleptoparasitism are characteristic. They are often bold and accustomed to human presence.
2. Listen for Calls. Their loud, distinctive calls are often heard before the bird is seen, especially the 'long call' which is a classic sound of the coast.
3. Study Age Plumages. Gulls can be challenging due to their complex age-related plumages. Familiarize yourself with juvenile, first-winter, second-winter, and adult plumages to aid identification.
4. Compare with Similar Species. Always consider other large gulls in the area. Pay close attention to mantle shade, leg color, and bill markings to differentiate them.

Similar species

Quick facts

Common Name:

European Herring Gull

Scientific Name:

Larus argentatus

Family:

Laridae

Size:

Large (55-67 cm)

Diet:

Omnivore, opportunistic scavenger

Habitat:

Coastal, urban, inland waters

Conservation Status:

Least Concern

Leg Color:

Pinkish-flesh

Bill Color:

Yellow with red spot

Fun facts

• The red spot on the bill of adult Herring Gulls acts as a target for chicks to peck at, stimulating the parents to regurgitate food. This behavior was famously studied by ethologist Niko Tinbergen.
• European Herring Gulls are highly intelligent and adaptable, capable of learning complex behaviors, such as dropping shellfish on rocks to break them open or following fishing boats for discards.
• Despite their 'Least Concern' conservation status globally, some local populations, particularly in parts of Europe, have experienced declines due to changes in food availability (e.g., landfill closures) and persecution.
• The taxonomy of 'Herring Gulls' is complex and has undergone significant revision. What was once considered a single widespread species is now often split into several distinct species, such as the European Herring Gull (Larus argentatus) and the American Herring Gull (Larus smithsonianus), among others.

Scientific classification

Kingdom

Animalia

Phylum

Chordata

Class

Aves

Order

Charadriiformes

Family

Laridae

Genus

Larus

Species

Larus argentatus

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