BirdAnalyst
Species · Minnesota · BBS 2026 Release · 1966–2025

Field Sparrow Population Trend in Minnesota

All statesForest birds

Field Sparrow in Minnesota has held roughly steady: down 8% on the route-weighted index since 1969.

-8%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 →
58Routes 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 →
58YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Field Sparrow 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 Field Sparrow in Minnesota. See the full index history below.

Field Sparrow Population Forecast in Minnesota

If the recent trend holds, Field Sparrow in Minnesota is projected to stay roughly flat through 2030, near 1.1 (95% range 0.20–2.0). A 5-year backtest shows a typical error of ±11.1%, with 100% of held-out values landing inside the 95% band.

-9%Change by 2030TrendPercent 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 →
1.1Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.20–2.095% 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 →
±11.1%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, Field Sparrow in Minnesota is projected to stay roughly flat through 2030, near 1.1 (95% range 0.20–2.0). A 5-year backtest shows a typical error of ±11.1%, with 100% of held-out values landing inside the 95% band.19672030
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 →
20261.10.222.0
20271.10.222.0
20281.10.212.0
20291.10.212.0
20301.10.202.0

Field Sparrow Survey Routes in Minnesota

Routes recording Field Sparrow 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 →
Sherburne Nr2620251990
Caledonia 21320252013
Whitewater1320001994
Millville1120251968
Caledonia1120121993
Money Creek1020231967
Chatfield 2920252003
Frontenac620241993
Ashby620211997
Big Stone520121995
Arlington419741971
Glyndon419911991
Wylie420192019
Whitewater 2420192011
Chatfield319991967
Huntley320221968
Ash Creek320251977
Edwards320241975
Le Roy319971993
Hartland219771967
Dawson220171983
Evergreen219881988
Floodwood219811981
Bemidji219791968
Oklee219881979

Field Sparrow Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganmississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.