Nonbreeding adult
  • Nonbreeding adult

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Ancient Murrelet

Synthliboramphus antiquus
Charadriiformes
This is a large and highly varied group of birds that do not have many outward similarities. Most are water birds that feed on invertebrates or small aquatic creatures. The order is well represented in Washington, with seven families:
Alcidae
Alcids are diving seabirds of the Northern Hemisphere. Most are more comfortable in and under the water than in the air. While some members of the family fly long distances in post-breeding dispersal or migration, others fly only with effort. Underwater, they use their wings as flippers to swim after fish, krill, and other aquatic prey. The majority nest in colonies on islands, and many are active in these colonies only at night, spending the day foraging on open water far from their nesting sites. Many nest in burrows, and most species lay only one egg each year, although some lay two. Both sexes incubate and care for the young. Most alcids are predominantly black-and-white, with different breeding and non-breeding plumages.
Uncommon fall and winter coast. May breed.
  • Species of Concern
  • Puget Sound Seabird Survey

General Description

A small, stocky bird, the Ancient Murrelet is slate-gray above, with gray and white sides and a white belly. The head is black, and the bill is pale. White on the throat extends back and up to the ears. During the breeding season, the throat is black, with a white band at the neck. The eyebrow is accented with white feathers at this time.

Habitat

Ancient Murrelets spend most of the time on cold-water seas. They forage over the edge of the continental shelf, and also closer to shore, especially in areas where tidal currents bring food up to the surface. They nest on islands or inland in dense forests with thick moss but little underbrush.

Behavior

The Ancient Murrelet is more agile in flight than most alcids and will often plunge directly from the air into the water to forage. Swimming underwater, using its wings as flippers, it catches most of its food within sixty feet of the surface. Its breeding behavior is unusual among seabirds in that, at night, in the nesting colonies, males sing from tree branches and other high perches.

Diet

Small fish, krill, and shrimp make up most of the Ancient Murrelet's diet.

Nesting

Ancient Murrelets nest in small colonies located on islands or in coastal forests. They place their nests at the bases of large trees in burrows under the roots, or under grass tussocks. Both sexes dig the burrows, which are 2-5 feet long and end in a nest chamber lined with twigs, leaves, and grass. Like many alcids, they are active in the colonies at night. They raise two young, and both parents incubate the eggs, often taking extended shifts on the nest, lasting from 2-6 days at a time. Incubation lasts for about 4 weeks. Within three days of hatching, the parents call the young out from the burrow and then fly to sea, where they repeatedly call for the young. The newly hatched chicks run to shore from the burrows, enter the water, and swim to the parents. Immediately upon reaching the water they can swim and dive well, using both their feet and wings for propulsion. Chicks do not receive their first meal until they have joined their parents on the water. The family swims offshore together, and groups have been found 30 miles from the colony within 18 hours of departure. Chicks will stay with and be fed by their parents at sea for at least four more weeks.

Migration Status

Some seasonal movement occurs. After the young hatch, Ancient Murrelets disperse widely at sea. In winter, they prefer coastal areas, often foraging within the kelp belt.

Conservation Status

Although still abundant, the world population of Ancient Murrelets has been declining for many years. They are very sensitive to disturbance during incubation, and introduced predators on nesting islands have had major impacts on a number of colonies. Oil contamination and loss of habitat are also potential threats to Ancient Murrelets.

When and Where to Find in Washington

More pelagic and gregarious than Marbled Murrelets, Ancient Murrelets are typically found farther out, with flocks of up to 30 birds a common sight in the winter. From October through December, they are numerous in offshore areas, are often visible from shore, and are the most likely of Washington's alcids to be found inland (especially in October and November). They are uncommon from January to March, and from mid-August through September. They are rare from April to mid-August, with non-breeders occasionally spotted on open salt water. Washington is at the southern edge of the Ancient Murrelet breeding range, and it is uncertain whether they currently nest here at all. The last confirmed breeding record in Washington is from 1924. Breeding-season sightings are so rare that it is most likely non-breeders that we see here. However, there is some evidence to suggest that there may be a small breeding population on one of the outer-coast islands in Clallam or Jefferson Counties.

Abundance Code DefinitionsAbundance

C=Common; F=Fairly Common; U=Uncommon; R=Rare; I=Irregular
EcoregionJanFebMarAprMayJunJulAugSepOctNovDec
OceanicFFFFUUUUUUFF
Pacific Northwest Coast
Puget TroughUUU UFF
North Cascades
West Cascades
East Cascades
Okanogan
Canadian Rockies
Blue Mountains
Columbia Plateau

Washington Range Map

North American Range Map

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Federal Endangered Species ListAudubon/American Bird Conservancy Watch ListState Endangered Species ListAudubon Washington Vulnerable Birds List
Yellow List

View full list of Washington State's Species of Special Concern