10/31/2026
"The most alarming thing is the extent of this decline," said Matthew Fuirst, an ecologist with Birds Canada and one of the authors of a study published Thursday in the journal FACETS.
Canada is home to 94 per cent of the global common loon population, with an estimated 254,000 breeding couples (half a million individuals) that migrate north to make the next generation every spring.
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The study analyzes loon breeding data from 3,421 lakes the past three or so decades, half of which came from thousands of volunteer observations as part of the long-running citizen science effort, the Canadian Lakes Loon Survey.
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The study suggests a 40 per cent average drop in loon chick productivity in 10 of 12 study areas — including in B.C. and Ontario — over the past three or so decades.
Loon chick productivity sank even more starkly by 65 per cent across Alberta, Saskatchewan and Manitoba since the early 1990s. Meanwhile, Canada's East Coast saw a 74 per cent reduction, according to researchers.
Quebec and the state of Maine were the only regions where chick productivity seemed more or less stable.
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"Human development and the development of shorelines, the environmental contaminants from climate change is another threat we're experiencing, " said Fuirst.
"As climate change influences weather patterns, the rain which is acidic makes the lake more acidic and thus reducing the amount of fish that are available for those loons."
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Fuirst said anglers should opt for lead-free, less-toxic tackle options, boaters should avoid disturbing loons and cottagers should ensure shorelines remain as natural as possible.
"The everyday person can take several actions to help steward lakes and the loons that they rely on," he said.
Koper encourages people concerned by the findings to take action and get involved in citizen science projects like the Canadian Lakes Loon Survey and "advocate with ... politicians about the importance of climate change and how it's impacting our wildlife and our lives."
https://www. cbc. ca/news/canada/manitoba/loon-decline-canada-9.7392013