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Species · Oklahoma · BBS 2025 Release · 1966–2024

Cassin's Sparrow Population Trend in Oklahoma

All statesGrassland birds

Cassin's Sparrow in Oklahoma has surged: up 16× on the route-weighted index since 1969.

16×Since 1969
30Routes In State
57Years

Notable Cassin's Sparrow Trends in Oklahoma

long arc increasecomputed index

Cassin's Sparrow has surged in Oklahoma: up 16× on the route-weighted index since 1969.

Cassin's Sparrow Population Forecast in Oklahoma

If the recent trend holds, Cassin's Sparrow in Oklahoma is projected to fall about 29% by 2029 — from 11 in 2024 to a central estimate of 8.0 (95% range 3.0–13). A 5-year backtest shows a typical error of ±29%, with 60% of held-out values landing inside the 95% band.

-29%Change by 2029
8.0Projected 2029 index
3.0–1395% range
±29%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
20257.62.613
20267.72.713
20277.82.813
20287.92.913
20298.03.013

Cassin's Sparrow Survey Routes in Oklahoma

Routes recording Cassin's Sparrow in Oklahoma.
Clear Lake9520241992
Felt6520241968
Hardesty5720241975
Rosston4420181970
Keyes3820241992
Hooker3720241992
Beaver2020181979
Woodward1320241992
Tatums1220112011
Jet820222000
Cookietown720061978
Lookout720241967
Erick620241969
Chester519861971
Hollis520241993
Grimes420241967
Eagle City320101996
Arapaho320141998
Phroso220232003
Mill Creek220141989
Elgin220152014
Randlett220241968
Reed220091985
Colony219951995
Wichita Mts West120222011

Cassin's Sparrow Population Trend in Other States

arizonaarkansascaliforniacoloradokansasnebraskanew-mexicotexaswyoming

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