Yellow-footed Gull
Yellow-footed Gull
Larus livens
At a Glance
Ignored for years, passed off as a local race of Western Gull, the Yellow-footed Gull is actually a very distinct species. It nests only in the Gulf of California, that long narrow arm of sea between Baja and the Mexican mainland. Every summer, after nesting, many Yellow-footed Gulls move north across the desert to the landlocked Salton Sea in southern California.
All bird guide text and rangemaps adapted from by Kenn Kaufman漏 1996, used by permission of Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Category
Gull-like Birds, Gulls and Terns
IUCN Status
Least Concern
Habitat
Coasts and Shorelines, Lakes, Ponds, and Rivers, Saltwater Wetlands
Region
California
Behavior
Direct Flight, Soaring
Population
40.000
Range & Identification
Migration & Range Maps
Most are probably permanent residents within Gulf of California. Some (up to several hundred) move north to Salton Sea, California, after nesting season. Main arrival typically late June, with peak numbers in August; small numbers usually remain through winter.
Description
21-23" (53-58 cm). Very much like Western Gull, but bill even thicker; legs of adults bright yellow. Immatures dingy brown, with pinkish legs at first. Best known by range (Western Gull is very seldom found at Salton Sea).
Size
About the size of a Mallard or Herring Gull
Color
Black, Gray, Pink, Red, White, Yellow
Wing Shape
Pointed, Tapered
Tail Shape
Rounded, Short, Square-tipped
Songs and Calls
Similar to calls of Western Gull, but deeper.
Call Pattern
Flat
Call Type
Raucous, Scream
Habitat
In U.S., barren shoreline of Salton Sea. Visitors to Salton Sea concentrate on west side, mostly on open shoreline, sometimes foraging in flooded fields nearby. In Gulf of California, found around islands and shoreline, sometimes well out to sea but almost never inland.
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Behavior
Eggs
Usually 3. Olive to buff, marked with dark brown. Incubation is probably by both parents.
Young
Probably fed by both parents. Probably able to fly at about 6-7 weeks after hatching.
Feeding Behavior
Feeding behavior not well known. Forages while walking, wading, or swimming, sometimes plunging into water in flight.
Diet
Fish, other marine life. Diet poorly known. On Gulf of California, probably includes fish, crabs, shrimp, clams, wide variety of other sea creatures. Also takes eggs and young of other birds. Will eat carrion, and scavenges around dumps and docks for scraps and refuse.
Nesting
Breeding behavior not well known, probably similar to that of Western Gull. Nests in colonies, with different arrangement from those of Western Gull: nests are arranged in a line along beach just above the reach of the highest tides, and each pair may defend a narrow territory from the nest down to the water. Nest site is on ground, on beach or at base of cliffs, a short distance above the high-tide line. Nest is a shallow depression, lined with seaweed, grass, or other plant material.
Climate Vulnerability
Conservation Status
Numbers probably stable at the moment. Overfishing and pollution of the Gulf of California could cause problems for this species and other seabirds nesting there.
Climate Threats Facing the Yellow-footed Gull
Choose a temperature scenario below to see which threats will affect this species as warming increases. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too.