Ring-Billed Gull

Larus delawarensis

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Photo of a ring-billed gull standing on a rock, water in background.
The ring-billed gull is Missouri’s most common gull. Adults can be told from our other most common gulls by their yellow legs and yellow bill with a black ring near the tip.
Jim Rathert
Family

Laridae (gulls) in the order Charadriiformes (shorebirds, gulls, terns)

Description

Ring-billed gull adults have pale gray upper wings and wide black wing tips with small white spots. The bill is yellow with a black ring near the tip. The legs are yellow. Immatures have pink legs, a pink bill with a dark outer half, a gray mantle, and brownish wings. Call is a two-syllable kyah keeya, higher than the herring gull’s.

Similar species: This is Missouri’s most common gull, but at least 18 species of gulls and 6 terns have been recorded in Missouri. Most people have a general idea of what gulls look like. But to distinguish the many species, it is best to learn from someone who has had experience with gull identification, because some species take four years to mature and may be seen in many different confusing plumages.

Size

Length: 17½ inches (tip of bill to tip of tail); wingspan: 48 inches.

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Photo of a ring-billed gull adult, standing on a post.
Ring-Billed Gull
In winter, when we see ring-billed gulls in Missouri, adults have brown-speckled heads.

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Photo of a juvenile ring-billed gull, in flight.
Ring-Billed Gull Juvenile In Flight
In Missouri, the ring-billed gull is a common migrant; as a winter resident, it’s common in the south, and rare in the north.

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Photo of six ring-billed gulls standing in shallow water.
Ring-Billed Gulls
Many ring-billed gulls overwinter in southern Missouri; their numbers are greatest December through February.

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Photo of a first-winter juvenile ring-billed gull, standing.
Ring-Billed Gull
In Missouri, ring-billed gulls are seen near locks and dams on the Mississippi River, near dams on large reservoirs, and at large landfills.

Ring-Billed_Gull_Juvenile_Standing_2-24-16.jpg

Photo of a juvenile ring-billed gull, standing.
Ring-Billed Gull
Immature ring-billed gulls have pink legs, a pink bill with a dark outer half, a gray mantle, and brownish wings.

Ring-Billed_Gull_Juvenile_Floating_1st_winter_2-24-16.jpg

Photo of a juvenile ring-billed gull floating on water.
Ring-Billed Gull Juvenile, On Water
The ring-billed gull is our most common gull, but nearly 25 species of gulls and terns have been seen in Missouri.

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Photo of a ring-billed gull foraging in shallow water.
Ring-Billed Gull
Ring-billed gulls will eat almost anything, including mussels, fish, worms, carrion, and discarded human food.

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Photo of a ring-billed gull adult, sitting on land.
Ring-Billed Gull
The spots or rings on the bills of many gulls is a “target” their hatchlings peck at; the tapping makes the adults regurgitate, feeding the young.

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Photo of a ring-billed gull flying against a blue sky.
Ring-Billed Gull
Gulls are excellent soarers, able to take advantage of both horizontal ocean winds and updrafts.

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Photo of a ring-billed gull in flight, showing tops of wings.
Ring-Billed Gull
The ring-billed gull is the most frequently observed gull inland in the entire eastern United States.

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Photo of a ring-billed gull stretching neck.
Ring-Billed Gull
Here in the middle of the continent, the sight of a seagull conjures images of exotic, carefree, coastal vacations.

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Photo of a ring-billed gull swimming.
Ring-Billed Gull
Gulls can float on the water like ducks, but they do not dive completely underwater.

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Photo of a ring-billed gull flying.
Ring-Billed Gull
Their distinct shape and white plumage makes gulls easy to spot as they fly near Missouri’s big rivers and reservoirs.
Habitat and conservation

This is by far the most frequently observed gull in Missouri and inland in the entire eastern United States. It is a common migrant and winter resident of large lakes and large rivers where at least some water is not ice covered. Gulls’ distinct shape and white plumage makes them easy to spot as they fly near our big rivers. They are excellent soarers, able to take advantage of both horizontal ocean winds and updrafts. Gulls can float on the water like ducks but do not dive underwater.

Foods

Bold opportunists and scavengers, they forage on and near water on mussels, fish, and worms but will eat most anything, including carrion and human food items. They sometimes forage in plowed fields for grubs and other small prey items, and in parking lots near water for fast-food refuse. The spot on the bills of many gulls is a “target” that the hatchlings instinctively peck at; this tapping causes a natural reflex in the adults to regurgitate and thus feed the young.

Ring-Billed Gull Distribution Map
Distribution in Missouri

Statewide. Gulls typically congregate near locks and dams on the Mississippi River, near dams on large reservoirs, and at large landfills.

Status

Common transient. As winter resident, common in the south part of the state, rare in the north.

Life cycle

Ring-billed gulls breed in colonies, mostly in the Great Lakes and northern tier of the United States, and northward into Canada. As with other gulls, the young are down-covered, alert, and able to move around soon after hatching. Young take four years to acquire adult plumage. Missouri is in the wintering range of ring-billed gulls. They start arriving here in October, their numbers are greatest December through February, and they fly north again in March and April.

Human connections

Where gulls are common, people view these quarreling, opportunistic feeders as loud, dirty, and disgusting. But when you live in the middle of the continent, the sight of a seagull conjures images of exotic, carefree, coastal vacations. Egging and plume hunting nearly wiped out gulls in the 1800s.

Ecosystem connections

Many inland-living ring-billed gulls of large lakes and rivers never see saltwater. Gulls are one of the many animals that interweave aquatic ecosystems with those of the land, and they require both habitats in order to live.