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Species · Maryland · BBS 2025 Release · 1966–2024

Golden-crowned Kinglet Population Trend in Maryland

All statesForest birds

Golden-crowned Kinglet in Maryland has surged: up 144% on the route-weighted index since 1995.

+144%Since 1995TrendPercent 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 →
5Routes 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 →
19YearsYears 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 MarylandNotable 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 Maryland. See the full index history below.

Golden-crowned Kinglet Population Forecast in Maryland

If the recent trend holds, Golden-crowned Kinglet in Maryland is projected to fall about 40% by 2029 — from 0.10 in 2024 to a central estimate of 0.06 (95% range 0.01–0.10). A 5-year backtest shows a typical error of ±53.7%, with 60% of held-out values landing inside the 95% band.

-40%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 →
0.06Projected 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 →
0.01–0.1095% 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 →
±53.7%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 Maryland is projected to fall about 40% by 2029 — from 0.10 in 2024 to a central estimate of 0.06 (95% range 0.01–0.10). A 5-year backtest shows a typical error of ±53.7%, with 60% of held-out values landing inside the 95% band.19692029
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 →
20250.050.010.10
20260.050.010.10
20270.060.010.10
20280.060.010.10
20290.060.010.10

Golden-crowned Kinglet Survey Routes in Maryland

Routes recording Golden-crowned Kinglet in Maryland.
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 →
Finzel420242016
Jennings220211995
Steyer220062006
Mt Nebo119691969
Vindex120121993

Golden-crowned Kinglet Population Trend in Other States

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

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