Do Nocturnally Migrating Passerines Concentrate Along the Coast of Lake Huron?

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Meng, Lucy (Lucy L.)




Many populations of North American migratory songbirds, especially aerial insectivores and Neotropical migrants, have been declining in the past few decades. The development of wind farms in many shorelines of the Great Lakes have raised concern for the migratory birds passing through the area. The Great Lakes represent an ecological barrier, and migratory birds may concentrate along the coast during active migration. We compared migration concentration of night flight calls (NFCs) using acoustic recorders at coastal and inland sites in coastal Lake Huron. We also used identified NFCs to compare similarities and differences in species composition among sites. The study took place in spring and fall of 2013 and 2014. Overall, we found no indication of consistent coastal concentrations in migratory birds. We also found no consistent species composition among sites. Our results indicate that coastal wind farms may not present the highest overall risk to migratory songbirds.






Carleton University

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