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The Bonaparte's Gull breeds throughout boreal Canada and Alaska, and winters along the Great Lakes and oceanic coasts south to Mexico. It is best surveyed on its wintering grounds primarily in the United States, and results suggest that the species has exhibited a large increase in abundance since about 1970, though with some regional declines. However, this assessment is considered to be low reliability because of the poor precision of the trend estimate. A lack of monitoring information from its Boreal breeding grounds complicates management, but the species' status appears secure. With such a large percentage of the world's breeding population, Canada's responsibility for the species' conservation is very high. This species has been identified as a priority for conservation and/or stewardship in one or more Bird Conservation Region Strategies in Canada.
The Bonaparte's Gull breeds throughout the northern Boreal ecozone; breeding individuals in many portions of this large and remote range may face few anthropogenic threats. Migration counts, at major autumn staging areas (e.g., the Niagara River and Quoddy Region in the Bay of Fundy), may be useful to help monitor populations of this species (Kirk et al. 2008).
Environment and Climate Change Canada and partners have developed Bird Conservation Region Strategies in each of Canada’s Bird Conservation Regions (BCRs). In these strategies, selected species are identified as priorities for one or more of the following reasons:
Select any of the sub-regions below to view the BCR strategy for additional details.