Loon Chick Production Falls 40% Across Breeding Range
A Birds Canada study of decades of lake observations finds Maine loons holding steady while other regions decline sharply.
Updated on Nov. 3, 2026 in Bird Watching
Live Poll
Do you think wildlife populations in your area are getting better or worse?
Birds Canada reports that loon chick production has dropped an average of 40% across the loon breeding range, based on decades of observations on thousands of lakes and ponds in Canada and the northern U.S. Declines were far steeper in the Canadian prairies and Maritime provinces.
Why it matters
Productivity, measured as surviving chicks per breeding pair, determines whether loon populations can sustain themselves over the long term. The findings point to pressures such as development, pollution, lead fishing sinkers and climate-related changes to water clarity and acidity.
The study covered decades of observations on thousands of lakes and ponds across Canada and the northern U.S., and productivity was measured as surviving chicks per breeding pair. Maine Audubon estimated almost 2,800 adult loons and 276 chicks in the state this year, though limited monitoring suggests productivity remains below the level needed to sustain the population.
The players
Birds Canada
A Canadian bird conservation organization that published the study on loon chick production across the breeding range.
Maine Audubon
The Maine chapter of the National Audubon Society that produced this year's estimate of the state's loon and chick population.
The details
Researchers analyzed loon observations gathered over decades, comparing chick survival across regions. While Maine's adult population appears healthy and chick numbers have stayed steady, the Canadian prairies and Maritime provinces have seen much sharper losses.
Timeline
Over the past 35 years, Maine loon productivity has remained relatively stable.
This year, Maine Audubon estimated almost 2,800 adult loons and 276 chicks in the state.
Season Trajectory
The Birds Canada findings extend decades of loon monitoring across the breeding range, showing that Maine's stability contrasts with sharp losses on the Canadian prairies and in the Maritime provinces. Together they suggest that regional differences in pressures such as development, pollution and lead tackle are shaping the species' long-term outlook.
Birders and lake residents can help by reporting loon sightings and avoiding lead fishing sinkers, which remain a documented threat. Tracking local loon chick survival over time is the most direct way for observers to contribute to the monitoring that revealed these declines.
The takeaway
Stable numbers in one region can hide steep declines elsewhere, so long-term productivity data matters as much as population counts. Birders who log loon chicks each season contribute directly to tracking whether the species is holding its ground.
Further reading
Explore more on Bird Watching to see how loon monitoring fits into broader wildlife observation.
Live Poll
Do you think wildlife populations in your area are getting better or worse?
