Northern Prairie Wildlife Research Center
Desertions caused by human activities can be a problem in heavily populated areas, but at Trimble this loss was held to a minimum by regulating opening dates of fishing season and by closing nesting areas to trespassers. The author believes there is no evidence that the presence of the investigator causes nest destructions such as described by Hammond and Forward (1956) for dry-land nesting ducks. During the study, 45 female Canada geese (Branta canadensis) safely accumulated their clutches in ground nests and started to incubate. Humans and dogs destroyed eight nests, but 95% of the remainder hatched successfully.