BirdAnalyst
Species · BCR 14 · BBS 2025 Release · 1966–2024

Ruby-throated Hummingbird In Atlantic Northern Forest

All regionsAtlantic Northern ForestGeneralists

Ruby-throated Hummingbird in Atlantic Northern Forest has increased: up 34% on the route-weighted index since 1968.

+34%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 →
148Routes 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 Ruby-throated Hummingbird in Atlantic Northern Forest. See the full index history below.

Ruby-throated Hummingbird In Atlantic Northern Forest Population Forecast

If the recent trend holds, Ruby-throated Hummingbird in Atlantic Northern Forest is projected to rise about 26% by 2029 — from 0.50 in 2024 to a central estimate of 0.63 (95% range 0.42–0.84). A 5-year backtest shows a typical error of ±14.6%, with 80% of held-out values landing inside the 95% band.

+26%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 →
0.63Projected 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 →
0.42–0.8495% 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 →
±14.6%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, Ruby-throated Hummingbird in Atlantic Northern Forest is projected to rise about 26% by 2029 — from 0.50 in 2024 to a central estimate of 0.63 (95% range 0.42–0.84). A 5-year backtest shows a typical error of ±14.6%, 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 →
20250.620.410.83
20260.620.410.83
20270.630.420.83
20280.630.420.84
20290.630.420.84

Routes In Atlantic Northern Forest

Routes recording Ruby-throated Hummingbird 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 →
East CalaisVERMONT42024
ReedsMAINE32023
LudlowMAINE31996
Big TwentyMAINE32007
AndoverMAINE32021
CummingtonMASSACHUSETTS32014
ChesterfieldMASSACHUSETTS32019
WilmotNEW-HAMPSHIRE32024
MckeeverNEW-YORK32021
DannemoraNEW-YORK32006
LandgroveVERMONT32024
BethelMAINE22019
East TroyMAINE22019
FreedomMAINE22018
HarmonyMAINE22024
BrooksMAINE22014
EastbrookMAINE22022
CastineMAINE21992
MedwayMAINE22018
Pillsbury PdMAINE21968
St DavidMAINE22005
Weeks BrookMAINE22003
YankeetuladiMAINE22009
Northfield 2MAINE22016
TopsfieldMAINE21992

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