[This page may need to be printed in "landscape" orientation because of the wide map.]
Snow Goose Fall Use Areas
Dark green = high use area (5 or more years)
Medium green = medium use area (3 to 4 years)
Light green = low use area (1 to 2 years)
Lesser snow geese use a 450-mile strip of the Alaskan and Canadian Beaufort Sea coastal
plain to build fat reserves necessary for migration to wintering areas in California. The
number of snow geese using the Alaskan coastal plain each fall varies from 12,000 to 300,000
birds. Geese arrive on the Alaskan coastal plain in late August, numbers of birds peak in
early to mid September, and birds depart by late September.
This snow goose distribution and frequency of use map is based on data
from aerial surveys flown in September from 1982 to 1993. During each survey a pilot flew a
fixed-wing aircraft from the Katakturak River to the Canadian border, and for each snow goose
flock seen, observers recorded the location and number of birds in the flock on a topographic
map. The surveys were used to determine the number and distribution of snow geese using the
Alaskan coastal plain. A map of the coastal plain was then overlain with a grid of 3-mile
by 3-mile blocks, and the frequency of use of each block was classified as low use (snow geese
observed in block 1 or 2 years), medium use (3-4 years), or high use (5 or more years). Over
80% of the high use blocks occur within the 1002 area.
The large area of coastal plain used by snow geese to build fat reserves does not indicate
that their feeding habitat is unlimited. On the contrary, the size of the area, variability
in food resources, and wide distribution of birds indicates that feeding habitat is widely
distributed, patchy, and necessary as a whole to fall staging snow geese.
Information about snow geese use of the Arctic Refuge is available in:
Brackney, A. W. 1990. Distribution, abundance, and productivity of fall
staging snow geese on the coastal plain of the Arctic NWR, 1989. Pages 11-13
in T. R. McCabe, editor. Annual Wildlife Inventories: 1002 Area - Arctic NWR
Annual Progress Report 1989. U.S. Fish and Wildlife Service, Anchorage, Alaska.
Hupp, J. W., and D. G. Robertson. 1998. Forage site selection by lesser snow
geese during autumn staging on the Arctic National Wildlife Refuge, Alaska. Wildlife
Monograph No. 138. 40 pp.
September 12, 2008
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