Censuses of the Canada goose population in Jackson Hole were made several times during the period September 1, 1962 and August 31, 1963. The greatest numbers of geese were present in September (855) and August (813). The population was lowest in mid-winter when 252 geese were located (February census). Project Number 113.
Dimmick, Ralph W.
"Population Study of Canada Geese in Jackson Hole, Wyoming,"
Jackson Hole Research Station Annual Report: Vol. 1963
, Article 4.
Available at: https://repository.uwyo.edu/jhrs_reports/vol1963/iss1/4