American Robins in eastern Canada
This is a post I should have written more than a year ago, because eBird seems to have cleaned things up a bit since June 2023 when I noticed it. First, some background. American Robin is a polytypic species, with Pyle (1998) delineating five subspecies as occurring in Canada and the US: caurinus -- breeds coastally from southeast Alaska to northwest Oregon and winters south to southern California propinquus -- year-round in the interior from south-central British Columbia and southern Saskatchewan and south to coastal southwest California east to western Texas migratorius -- breeds from Alaska south and east to central British Columbia then to central Quebec and southeast to New Jersey and winters south within that range but also south from New Mexico to Florida nigrideus -- breeds from northern Quebec through Newfoundland, wintering south to Mississippi and Florida achrusturus -- year-r...