BirdAnalyst
Species · Minnesota · BBS 2025 Release · 1966–2024

Red-breasted Merganser Population Trend in Minnesota

All statesWaterfowl

Red-breasted Merganser in Minnesota has declined: down 27% on the route-weighted index since 1976.

-27%Since 1976TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
5Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
16YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Red-breasted Merganser Trends in MinnesotaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Red-breasted Merganser in Minnesota. See the full index history below.

Red-breasted Merganser Survey Routes in Minnesota

Routes recording Red-breasted Merganser in Minnesota.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Hovland520211973
Debs419731973
Waskish219941993
Mcgregor119931993
Erie119901990

Red-breasted Merganser Population Trend in Other States

alaskamainemichiganwisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.