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Species · Kansas · BBS 2025 Release · 1966–2024

Bewick's Wren Population Trend in Kansas

All statesForest birds

Bewick's Wren in Kansas has edged down: down 23% on the route-weighted index since 1969.

-23%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 →
24Routes 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 →
53YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Bewick's Wren Trends in KansasNotable 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 Bewick's Wren in Kansas. See the full index history below.

Bewick's Wren Population Forecast in Kansas

If the recent trend holds, Bewick's Wren in Kansas is projected to stay roughly flat through 2029, near 0.13 (95% range 0.00–0.33). A 5-year backtest shows a typical error of ±180%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.13Projected 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 →
0.00–0.3395% 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 →
±180%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, Bewick's Wren in Kansas is projected to stay roughly flat through 2029, near 0.13 (95% range 0.00–0.33). A 5-year backtest shows a typical error of ±180%, 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 →
20250.130.000.33
20260.130.000.33
20270.130.000.33
20280.130.000.33
20290.130.000.33

Bewick's Wren Survey Routes in Kansas

Routes recording Bewick's Wren in Kansas.
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 →
Dalton220031970
Ashland220061971
Gray219671967
Lincolnville220232003
Humboldt119911991
Lapland120171986
Wellington120091968
Coats120071991
Coldwater120061998
Dover119981990
Barclay119991992
Wreford120231967
Ellinor120071976
Buckeye120031972
Kanopolis120011972
Hanover120171985
Hollenberg119821982
Jewell119921992
Reece120242001
Berwet120222001
Le Loup120182002
Olsburg120232002
Longton120191976
Solomon119971989

Bewick's Wren Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoidahoillinoisindianaiowakentuckymarylandmississippimissourinevadanew-mexiconorth-carolinaohiooklahomaoregonpennsylvaniatennesseetexasutahvirginiawashingtonwest-virginiawisconsinwyoming

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