Note lone snow goose lake and tree sparrow. Details in link above
"If we had not had a Christmas Bird Count in those early years, we would not have as strong an understanding of long term bird trends. Many of these changes take place gradually." - Chan Robbins, legendary biologist, retired USFWS employee, and creator of the North American Breeding Bird Survey
Robbins bio:
https://www.pwrc.usgs.gov/robbins/index.cfm
