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Aleutian Cackling Goose
Branta hutchinsii leucopareia
37.654, -122.154
Field Notes
Description:
The Aleutian Cackling Goose (Branta hutchinsii leucopareia), formerly known as the Aleutian Canada Goose (Branta canadensis leucopareia), is small subspecies of Cackling Goose averaging 17The Aleutian Cackling Goose has the typical black head and neck, white cheek patches, grayish brown back and wings, white rump, black tail feathers, legs, and feet of the species. It is distinguished by a conspicuous white neck ring at the base of the neck that, in adult plumage, is usually greater than 10 mm wide and is subtended by a ring of darker feathers. The cheek patches are usually separated by a black line under the throat and the breast is a pale grayish-brown color, although a small number of lighter and darker breasted birds occur.00 to 2100 grams.
Habitat:
grassy shoreline along San Francisco Bay
Notes:
By the late 1970s, the entire population of Aleutian geese numbered about 2000 birds. The primary threat to the Aleutian Cackling Goose has been the Arctic Fox, introduced to the Aleutian Islands by Russian fur traders between 1836 and 1930. The Cackling Canada Goose was considered extinct until a colony was discovered on Buldir Island in 1962. Since then, the Aleutian Cackling Goose has made a comeback and was removed from the endangered species list in 2001.
Aleutian geese typically arrive in California in mid October each year. The majority of the population goes right to their primary wintering areas in the Central Valley. However, since 2002 there has been a relatively small (~1500-5000) number of geese that spend fall and winter on the north coast. In about late December the geese wintering in the Central Valley begin moving north, and by mid-February most of the Aleutian goose population is located in northwestern California until they depart for the Aleutian Islands in mid-April. Humboldt County more often, likely as a result of a combination of hazing in Del Norte County and continued population growth. As of 2004, Humboldt County began receiving the majority of Aleutian goose use on the northwest coast from January through April.
Currently, the population stands at about 160,000 birds.
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