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

Northern Mockingbird In Atlantic Northern Forest

All regionsAtlantic Northern ForestGeneralists

Northern Mockingbird in Atlantic Northern Forest has surged: up 189% on the route-weighted index since 1971.

+189%Since 1971TrendPercent 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 →
90Routes 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 →
56YearsYears 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 Mockingbird in Atlantic Northern Forest. See the full index history below.

Northern Mockingbird In Atlantic Northern Forest Population Forecast

If the recent trend holds, Northern Mockingbird in Atlantic Northern Forest is projected to fall about 49% by 2030 — from 0.18 in 2025 to a central estimate of 0.09 (95% range 0.00–0.41). A 5-year backtest shows a typical error of ±34.9%, with 100% of held-out values landing inside the 95% band.

-49%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 →
0.09Projected 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 →
0.00–0.4195% 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 →
±34.9%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 Mockingbird in Atlantic Northern Forest is projected to fall about 49% by 2030 — from 0.18 in 2025 to a central estimate of 0.09 (95% range 0.00–0.41). A 5-year backtest shows a typical error of ±34.9%, 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 →
20260.110.000.43
20270.110.000.43
20280.100.000.42
20290.100.000.42
20300.090.000.41

Routes In Atlantic Northern Forest

Routes recording Northern Mockingbird 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 →
MarlowNEW-HAMPSHIRE102007
New HartfordCONNECTICUT91987
TurnerMAINE62002
PittsfieldMASSACHUSETTS61992
BiddefordMAINE52018
CheshireMASSACHUSETTS51994
ClarksvilleNEW-HAMPSHIRE42001
Otisfield GrMAINE32008
Bowdoin CtrMAINE31993
Forest StaMAINE31984
ConcordNEW-HAMPSHIRE32025
WestbrookMAINE22017
DebloisMAINE21991
CambridgeMAINE21997
CornvilleMAINE22025
ChesterfieldMASSACHUSETTS22006
GlenNEW-HAMPSHIRE22025
S ReadingVERMONT22003
Post MillsVERMONT22001
East HavenVERMONT21988
New HartfordCONNECTICUT12006
BethelMAINE11999
GreenwoodMAINE11976
ReedsMAINE11998
South ArmMAINE12012

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