Grand Teton National Park Report
Between 1955 and 1974, the population of Canada geese in the United States almost doubled. Despite this trend, populations in the Pacific Flyway appear to have declined 10 percent (Bell rose 1976) and the causes for the decrease are not obvious. During earlier work, Dimmick (1968) concluded that the 1964 breeding population in Jackson Hole was stabilized at approximately 300 birds with 40-47 percent consisting of breeding pairs. The current status of the goose population is not known and the effects of dramatic changes in land use on the birds is undetermined. Therefore, this study will attempt to compare current conditions and the resulting population status with those of the early 1960's and the late 1940's (Craighead and Craighead 1949).
Zeveloff, Samuel I.
"Population Study of Canada Geese of Jackson Hole,"
University of Wyoming National Park Service Research Center Annual Report: Vol. 2
, Article 14.
Available at: http://repository.uwyo.edu/uwnpsrc_reports/vol2/iss1/14