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

Brown Creeper Population Trend in Maryland

All statesForest birds

Brown Creeper in Maryland has surged: up 78% on the route-weighted index since 1978.

+78%Since 1978
9Routes In State
42Years

Notable Brown Creeper Trends in Maryland

No notable trend signals for Brown Creeper in Maryland. See the full index history below.

Brown Creeper Population Forecast in Maryland

If the recent trend holds, Brown Creeper in Maryland is projected to stay roughly flat through 2029, near 0.05 (95% range 0.01–0.09). A 5-year backtest shows a typical error of ±10.3%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.05Projected 2029 index
0.01–0.0995% range
±10.3%Backtest error
19762029
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
20250.050.010.09
20260.050.010.09
20270.050.010.09
20280.050.010.09
20290.050.010.09

Brown Creeper Survey Routes in Maryland

Routes recording Brown Creeper in Maryland.
Jennings220242001
Floyd120171976
Vindex120181977
Oldtown120011985
Smithsburg120062006
Steyer120061998
Finzel120221999
Green Ridge120052001
Indiantown119821981

Brown Creeper Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoillinoisindianaiowamainemassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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