• Christmas Bird Count, December 15, 2004: 72 Common Mergansers.
• Early October 2005: 3 Common Mergansers seen on Enos Lake.
• September 2005: 9 Common Mergansers seen during Nanoose Bay Seabird Survey.
• October 6, 2005: 1 Common Merganser seen at Brickyard Cove.
• Christmas Bird Count, December 17, 2005: 69 Common Mergansers.
• January 11, 2006: 3 male and 2 female Common Mergansers on Dolphin Lake.
• January 21, 2006: A few Common Mergansers at the Englishman River Estuary, and 2 seen in January during Nanoose Bay Seabird Survey.
• February 8, 2006: A few Common Mergansers at the Englishman River Estuary, and 1 seen in February during Nanoose Bay Seabird Survey.
• March 2006: 6 Common Mergansers seen during Nanoose Bay Seabird Survey.
• September 3, 2006: 5 female Common Mergansers seen at the Englishman River Estuary.
• October 1, 2006: 4 Common Mergansers seen at the Englishman River Estuary.