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Species · BCR 14 · BBS 2026 Release · 1966–2025

Chipping Sparrow In Atlantic Northern Forest

All regionsAtlantic Northern ForestForest birds

Chipping Sparrow in Atlantic Northern Forest has increased: up 31% on the route-weighted index since 1968.

+31%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 →
152Routes 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 Chipping Sparrow in Atlantic Northern Forest. See the full index history below.

Chipping Sparrow In Atlantic Northern Forest Population Forecast

If the recent trend holds, Chipping Sparrow in Atlantic Northern Forest is projected to rise about 14% by 2030 — from 14 in 2025 to a central estimate of 16 (95% range 13–19). A 5-year backtest shows a typical error of ±10.7%, with 100% of held-out values landing inside the 95% band.

+14%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 →
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 →
13–1995% 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 →
±10.7%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, Chipping Sparrow in Atlantic Northern Forest is projected to rise about 14% by 2030 — from 14 in 2025 to a central estimate of 16 (95% range 13–19). A 5-year backtest shows a typical error of ±10.7%, with 100% 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 →
2026161319
2027161319
2028161319
2029161319
2030161319

Routes In Atlantic Northern Forest

Routes recording Chipping Sparrow in Atlantic Northern Forest.
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 →
ChesterfieldMASSACHUSETTS542025
Bowdoin CtrMAINE482021
BiddefordMAINE452019
N OrangeMASSACHUSETTS392025
PittsfieldMASSACHUSETTS382016
Old ForgeNEW-YORK332006
MarlboroVERMONT332025
WestbrookMAINE322024
ManchesterMAINE321995
ConcordNEW-HAMPSHIRE322025
HermonMAINE312021
NorthfieldMAINE311981
FitzwilliamNEW-HAMPSHIRE302025
WalpoleNEW-HAMPSHIRE302025
DannemoraNEW-YORK292006
CanterburyNEW-HAMPSHIRE282025
WilmotNEW-HAMPSHIRE282025
East TroyMAINE272021
Turner 2MAINE272025
GreenwoodMAINE262025
GlenNEW-HAMPSHIRE262025
Blue Ridge SNEW-YORK262010
Dexter LakeNEW-YORK261975
CharlestonMAINE242021
CornvilleMAINE242025

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