Review List of Michigan Birds

Status definitions (adopted November 1997):
Regular: Species that have been recorded in at least nine of the last 10 years, or have over 30 records over the last 10 years.
Casual: Species that have been recorded more than three times, but fewer than 30 times, in the last 10 years, and were recorded in fewer than nine of the last 10 years.
Accidental: Species that have been recorded three or fewer times in the last 10 years.