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Species · Oklahoma · BBS 2025 Release · 1966–2024

Henslow's Sparrow Population Trend in Oklahoma

All statesGrassland birds

Henslow's Sparrow in Oklahoma has fallen sharply: down 65% on the route-weighted index since 1995.

-65%Since 1995
4Routes In State
28Years

Notable Henslow's Sparrow Trends in Oklahoma

long arc declinecomputed index

Henslow's Sparrow has fallen sharply in Oklahoma: down 65% on the route-weighted index since 1995.

Henslow's Sparrow Population Forecast in Oklahoma

If the recent trend holds, Henslow's Sparrow in Oklahoma is projected to stay roughly flat through 2027, near 0.02 (95% range 0.00–0.27). A 5-year backtest shows a typical error of ±79.3%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2027
0.02Projected 2027 index
0.00–0.2795% range
±79.3%Backtest error
19932027
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
20230.050.000.30
20240.040.000.29
20250.040.000.28
20260.030.000.28
20270.020.000.27

Henslow's Sparrow Survey Routes in Oklahoma

Routes recording Henslow's Sparrow in Oklahoma.
Bartlesville220192006
Foraker120221993
Skiatook120102010
Welch120071994

Henslow's Sparrow Population Trend in Other States

delawareillinoisindianaiowakansaskentuckymarylandmichiganminnesotamissourinebraskanew-yorknorth-carolinanorth-dakotaohiopennsylvaniasouth-dakotavermontvirginiawest-virginiawisconsin

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