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Publisher-reported update

2025-10-24

The following publication includes data from two coastal aerial surveys in Atlantic Canada in 2017: a spring breeding survey for Common Eiders (Somateria mollissima dresseri) and Black Guillemots (Cepphus grylle), and a summer moult survey for Common Eiders. Counts of individuals and groups were made around shorelines, islands, and exposed ledges. Surveys were conducted with 3 observers from a fixed-wing aircraft flying between 400 and 800 feet above sea level. Common Eiders: During the spring breeding survey, counts were made of individuals and groups of adult males on the water around coastlines and potential breeding islands. Timing of survey (mid-May) is intended to count breeding birds (males only) shortly after peak egg-laying when females initiate incubation and males begin dispersal from their breeding sites. Therefore, counts represent general numbers of breeding males for the region, but locations of bird groups do not necessarily reflect breeding sites/islands. For the summer moult survey, large flocks of flightless eiders were searched for on coastal areas along the Bay of Fundy (New Brunswick) and Nova Scotia. Large flocks of moulting males were seldom observed, and…

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