Blaming the wild birds for the problems caused by intensive agriculture and suburban development.
Most Canada Geese used to be migratory—those big vees of “honkers” that signal the change in seasons each year as they pass overhead. Though there are still several million migratory Canada Geese, for a period at the end of the nineteenth century they became scarce. (Overhunting, egg collecting, and development of wetlands were among the causes of the decline.) In the 1930s, efforts to restore their numbers led to government-sponsored releases of resident “giant” Canada Geese for hunting. Not long after, as lawns started to proliferate, many of these resident geese flocks began to thrive and expand their range. Though resident and migratory geese may mingle during winter, they retain separate breeding ranges and do not typically interbreed.
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Resident Canada Geese have adjusted well to living near people, with few significant curbs on their numbers. Resident geese in cities and suburbs are safe from most predators, many people like to feed them, and they are less vulnerable to hunting because they tend to live in settled areas where firearm restrictions often apply. By contrast, migratory Canada Goose populations are held in check by migration mortality, predation, late winter storms, and hunting. Resident geese begin nesting at a younger age and produce larger clutches than migratory geese. It’s no wonder their numbers are rising so fast.
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Canada Geese are one of the few bird species that can digest grass, so they do well on the large expanses of lawn in parks, backyards, golf courses, farm fields, and airports.
https://www.allaboutbirds.org/news/canada-goose-resident-vs-migratory/
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