BirdAnalyst
Species · BCR 30 · BBS 2025 Release · 1966–2024

Northern House Wren In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastForest birds

Northern House Wren in New England / Mid-Atlantic Coast has increased: up 46% on the route-weighted index since 1968.

+46%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 →
160Routes 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 →
58YearsYears 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 Northern House Wren in New England / Mid-Atlantic Coast. See the full index history below.

Northern House Wren In New England / Mid-Atlantic Coast Population Forecast

If the recent trend holds, Northern House Wren in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2029, near 6.5 (95% range 4.0–9.0). A 5-year backtest shows a typical error of ±28.8%, with 20% of held-out values landing inside the 95% band.

-1%Change by 2029TrendPercent 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 →
6.5Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
4.0–9.095% 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 →
±28.8%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, Northern House Wren in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2029, near 6.5 (95% range 4.0–9.0). A 5-year backtest shows a typical error of ±28.8%, with 20% of held-out values landing inside the 95% band.19662029
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 →
20256.54.08.9
20266.54.08.9
20276.54.09.0
20286.54.09.0
20296.54.09.0

Routes In New England / Mid-Atlantic Coast

Routes recording Northern House Wren 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 →
BrocktonMASSACHUSETTS382019
BelchertownMASSACHUSETTS332024
SouthingtonCONNECTICUT322024
Long HillCONNECTICUT262019
MaynardMASSACHUSETTS232022
PrattvilleMASSACHUSETTS222019
MadisonMARYLAND212024
WillimanticCONNECTICUT202018
GranbyCONNECTICUT202024
S BarreMASSACHUSETTS192024
DoverNEW-HAMPSHIRE192024
AlbionNEW-JERSEY192022
HolmansvilleNEW-JERSEY192009
Quonset PtRHODE-ISLAND192024
Casimir Pulaski SfRHODE-ISLAND192018
ShermanCONNECTICUT182019
CranburyNEW-JERSEY182024
Warren 2MASSACHUSETTS172024
PurdyNEW-YORK172022
MarionMASSACHUSETTS162024
PrincetonMASSACHUSETTS161976
HoldenMASSACHUSETTS162024
KeyportNEW-JERSEY162022
MysticCONNECTICUT152023
Mid HaddamCONNECTICUT152024

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