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

Wood Thrush Population Trend in Kansas

All statesForest birds

Wood Thrush in Kansas has increased: up 39% on the route-weighted index since 1970.

+39%Since 1970TrendPercent 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 →
21Routes 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 →
35YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Wood Thrush 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 Wood Thrush in Kansas. See the full index history below.

Wood Thrush Population Forecast in Kansas

If the recent trend holds, Wood Thrush in Kansas is projected to fall about 56% by 2029 — from 0.15 in 2024 to a central estimate of 0.07 (95% range 0.00–0.16). A 5-year backtest shows a typical error of ±72.1%, with 60% of held-out values landing inside the 95% band.

-56%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 →
0.07Projected 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 →
0.00–0.1695% 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 →
±72.1%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, Wood Thrush in Kansas is projected to fall about 56% by 2029 — from 0.15 in 2024 to a central estimate of 0.07 (95% range 0.00–0.16). A 5-year backtest shows a typical error of ±72.1%, with 60% of held-out values landing inside the 95% band.19682029
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 →
20250.070.000.16
20260.070.000.16
20270.070.000.16
20280.070.000.16
20290.070.000.16

Wood Thrush Survey Routes in Kansas

Routes recording Wood Thrush 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 →
Dover220222022
Severance220242003
Melrose120231968
Galesburg120171996
Humboldt120101997
Olathe119861985
Barclay120142014
Wreford120111995
Ellinor119781978
Chapman119771977
Kanopolis120042004
Grantville119831968
Rock Creek120141968
Hanover120031969
Minneapolis119681968
Jewell119721972
Morehead120172017
Trading Post120242000
Ash Valley120002000
Jamestown120132003
Rock Creek 2120242024

Wood Thrush Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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