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Species · Maine · BBS 2025 Release · 1966–2024

Golden-crowned Kinglet Population Trend in Maine

All statesForest birds

Golden-crowned Kinglet in Maine has edged down: down 18% on the route-weighted index since 1969.

-18%Since 1969TrendPercent 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 →
65Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Golden-crowned Kinglet Trends in MaineNotable 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 Golden-crowned Kinglet in Maine. See the full index history below.

Golden-crowned Kinglet Population Forecast in Maine

If the recent trend holds, Golden-crowned Kinglet in Maine is projected to rise about 72% by 2029 — from 0.90 in 2024 to a central estimate of 1.5 (95% range 0.00–3.3). A 5-year backtest shows a typical error of ±128.6%, with 100% of held-out values landing inside the 95% band.

+72%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 →
1.5Projected 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 →
0.00–3.395% 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 →
±128.6%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, Golden-crowned Kinglet in Maine is projected to rise about 72% by 2029 — from 0.90 in 2024 to a central estimate of 1.5 (95% range 0.00–3.3). A 5-year backtest shows a typical error of ±128.6%, with 100% 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 →
20251.50.003.2
20261.50.003.2
20271.50.003.3
20281.50.003.3
20291.50.003.3

Golden-crowned Kinglet Survey Routes in Maine

Routes recording Golden-crowned Kinglet in Maine.
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 →
Big Twenty1320081993
Topsfield1119961978
Northfield1119811976
Big Twenty 21120092009
St David820051983
Nesowadnehun720211990
Eastbrook720241974
Carrying Pl620241980
Waite519771977
Pillsbury Pd519681968
Horse Mtn520101984
Yankeetuladi520091994
Reeds420221990
Ashland420081988
Weeks Brook420161995
Baker Lake420051994
Castine319951983
Aurora320191976
Cooper320211975
Moose River320021986
Wytopitlock319981979
Benedicta319981976
Forest Sta320001966
Clayton Lake320081977
Ludlow319981968

Golden-crowned Kinglet Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutgeorgiaidahomarylandmassachusettsmichiganminnesotamontananevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinaohiooregonpennsylvaniasouth-dakotatennesseeutahvermontwashingtonwest-virginiawisconsinwyoming

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