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Species · Kansas · BBS 2025 Release · 1966–2024

Cassin's Sparrow Population Trend in Kansas

All statesGrassland birds

Cassin's Sparrow in Kansas has collapsed: down 78% on the route-weighted index since 1970.

-78%Since 1970
26Routes In State
56Years

Notable Cassin's Sparrow Trends in Kansas

long arc declinecomputed index

Cassin's Sparrow has collapsed in Kansas: down 78% on the route-weighted index since 1970.

Cassin's Sparrow Population Forecast in Kansas

If the recent trend holds, Cassin's Sparrow in Kansas is projected to rise about 12% by 2029 — from 0.15 in 2024 to a central estimate of 0.17 (95% range 0.00–3.4). A 5-year backtest shows a typical error of ±208.4%, with 100% of held-out values landing inside the 95% band.

+12%Change by 2029
0.17Projected 2029 index
0.00–3.495% range
±208.4%Backtest error
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 index95% low95% high
20250.350.003.6
20260.310.003.6
20270.260.003.5
20280.220.003.5
20290.170.003.4

Cassin's Sparrow Survey Routes in Kansas

Routes recording Cassin's Sparrow in Kansas.
Ashland2120211971
Coldwater1620111976
Hopewell720112003
Ulysses620222000
Grigston620172002
Lakin520171967
Plymell420242000
Hays320111974
Gove320221980
Ash Valley320142002
St John220141974
Albert219831983
Gray219781977
Leoville220111989
Leoti220222000
Coats120221974
Kanopolis120132013
Wallace120181967
Minneapolis119741974
Phillipsburg119791979
Missler120151975
Ruleton120181991
Berwet120122011
Lincolnville120112011
Rexford120222011

Cassin's Sparrow Population Trend in Other States

arizonaarkansascaliforniacoloradonebraskanew-mexicooklahomatexaswyoming

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