BirdAnalyst
Species · BCR 30 · BBS 2026 Release · 1966–2025

Brown Creeper In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastForest birds

Brown Creeper in New England / Mid-Atlantic Coast has surged: up 521% on the route-weighted index since 1968.

+521%Since 1968TrendPercent 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 →
57Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 Brown Creeper in New England / Mid-Atlantic Coast. See the full index history below.

Brown Creeper In New England / Mid-Atlantic Coast Population Forecast

If the recent trend holds, Brown Creeper in New England / Mid-Atlantic Coast is projected to fall about 55% by 2030 — from 0.35 in 2025 to a central estimate of 0.16 (95% range 0.03–0.28). A 5-year backtest shows a typical error of ±39.6%, with 60% of held-out values landing inside the 95% band.

-55%Change by 2030TrendPercent 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 →
0.16Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.03–0.2895% 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 →
±39.6%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, Brown Creeper in New England / Mid-Atlantic Coast is projected to fall about 55% by 2030 — from 0.35 in 2025 to a central estimate of 0.16 (95% range 0.03–0.28). A 5-year backtest shows a typical error of ±39.6%, with 60% of held-out values landing inside the 95% band.19662030
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 →
20260.150.030.28
20270.150.030.28
20280.150.030.28
20290.150.030.28
20300.160.030.28

Routes In New England / Mid-Atlantic Coast

Routes recording Brown Creeper in New England / Mid-Atlantic Coast.
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 →
Casimir Pulaski SfRHODE-ISLAND62018
MaynardMASSACHUSETTS32025
DoverNEW-HAMPSHIRE32025
ShermanCONNECTICUT21992
MarionMASSACHUSETTS22025
S BarreMASSACHUSETTS22025
N. AndoverMASSACHUSETTS22025
Warren 2MASSACHUSETTS22025
StraffordNEW-HAMPSHIRE22025
MysticCONNECTICUT11989
E HartlandCONNECTICUT11984
BuckinghamCONNECTICUT12001
UncasvilleCONNECTICUT12025
WoodstockCONNECTICUT11990
WestbrookCONNECTICUT11992
WillimanticCONNECTICUT12005
No WoodburyCONNECTICUT12025
GreenwichCONNECTICUT11984
DanburyCONNECTICUT11972
WarrenCONNECTICUT12011
Long HillCONNECTICUT12017
Mid HaddamCONNECTICUT12025
Woodstock 2CONNECTICUT12024
Warren 2CONNECTICUT12025
GranbyCONNECTICUT12025

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.