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

Warbling Vireo Population Trend in Minnesota

All statesForest birds

Warbling Vireo in Minnesota has held roughly steady: up 1% on the route-weighted index since 1969.

+1%Since 1969TrendPercent 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 →
85Routes 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Warbling Vireo 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 Warbling Vireo in Minnesota. See the full index history below.

Warbling Vireo Population Forecast in Minnesota

If the recent trend holds, Warbling Vireo in Minnesota is projected to stay roughly flat through 2029, near 2.3 (95% range 1.5–3.2). A 5-year backtest shows a typical error of ±7.4%, with 100% of held-out values landing inside the 95% band.

-5%Change by 2029TrendPercent 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 →
2.3Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
1.5–3.295% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±7.4%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Warbling Vireo in Minnesota is projected to stay roughly flat through 2029, near 2.3 (95% range 1.5–3.2). A 5-year backtest shows a typical error of ±7.4%, with 100% of held-out values landing inside the 95% band.19672029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
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Warbling Vireo Survey Routes in Minnesota

Routes recording Warbling Vireo 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 →
Oklee2720211979
Worthington1720242004
Greenbush1220241995
Chatfield 21120242003
Tracy920242004
New London920241994
Glenwood920191993
Ashby920212003
Sherburne Nr920241990
Chokio720241979
Lake Bronson720111978
Fairmont720231993
Redwood Fall620241978
St Stephen620161967
Whitewater620001994
Glyndon520241982
Chatfield419991967
Ash Creek420241976
Millville420191970
Appleton420241979
Cass Lake419951983
Caledonia 2420242013
Hartland320051993
Huntley320241968
Minnetonka320241969

Warbling Vireo Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganmississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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