You can use it for research or reference. To access the current information, please visit NatureCounts - The State of Canada’s Birds (external link).
Black Guillemots are difficult to monitor because they nest in crevices and are broadly distributed up to the remote reaches of the Canadian Arctic. Monitoring data are available for breeding colonies in Quebec and Newfoundland, and for a portion of the species’ wintering range. Results from Environment and Climate Change Canada's Seabird Colony Monitoring Program indicate a large increase over the past four decades. Results from the Christmas Bird Count also suggest a large increase since the 1970s (Meehan et al. 2018), though the trends are imprecise and the majority of birds winter offshore and at higher latitudes. Overall, these results suggest that the national population has increased relative to the 1970s. However, since the vast majority of the species' range lies to the north where monitoring is insufficient, the national status for Black Guillemot is still somewhat uncertain; the reliability of this assessment is considered to be low. The Black Guillemot is at an acceptable level relative to its national population goal (see BBS Canada graph below).
Additional information on: Seabird Colony Monitoring Program
