BirdAnalyst
Species · BCR 13 · BBS 2025 Release · 1966–2024

Scarlet Tanager In Lower Great Lakes / St. Lawrence Plain

All regionsLower Great Lakes / St. Lawrence PlainGeneralists

Scarlet Tanager in Lower Great Lakes / St. Lawrence Plain has held roughly steady: down 2% on the route-weighted index since 1968.

-2%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 →
84Routes 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 Scarlet Tanager in Lower Great Lakes / St. Lawrence Plain. See the full index history below.

Scarlet Tanager In Lower Great Lakes / St. Lawrence Plain Population Forecast

If the recent trend holds, Scarlet Tanager in Lower Great Lakes / St. Lawrence Plain is projected to rise about 27% by 2029 — from 1.8 in 2024 to a central estimate of 2.2 (95% range 1.4–3.1). A 5-year backtest shows a typical error of ±36.2%, with 80% of held-out values landing inside the 95% band.

+27%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 →
2.2Projected 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 →
1.4–3.195% 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 →
±36.2%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, Scarlet Tanager in Lower Great Lakes / St. Lawrence Plain is projected to rise about 27% by 2029 — from 1.8 in 2024 to a central estimate of 2.2 (95% range 1.4–3.1). A 5-year backtest shows a typical error of ±36.2%, with 80% 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 →
20252.31.43.1
20262.31.43.1
20272.31.43.1
20282.21.43.1
20292.21.43.1

Routes In Lower Great Lakes / St. Lawrence Plain

Routes recording Scarlet Tanager in Lower Great Lakes / St. Lawrence Plain.
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 →
W ShokanNEW-YORK142019
BranchportNEW-YORK92024
ShaftsburyVERMONT82024
N WilmurtNEW-YORK71998
LucerneOHIO62024
HarrisvillePENNSYLVANIA62023
TrumansburgNEW-YORK52024
NashvilleNEW-YORK42018
SalemNEW-YORK42024
North EastonNEW-YORK42024
GarrettsvileOHIO41991
HiramOHIO42019
Slippery RkPENNSYLVANIA41990
TeeplevillePENNSYLVANIA42024
HighlandNEW-YORK32022
Canadice LNEW-YORK32022
Mt MorrisNEW-YORK32024
WatertownNEW-YORK32011
OgdensburgNEW-YORK32024
ParishvilleNEW-YORK32024
PhiladelphiaNEW-YORK32024
PeruOHIO31975
MiddlefieldOHIO32016
Ferris CrnrsPENNSYLVANIA32024
AkeleyPENNSYLVANIA31976

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