BirdAnalyst
Species · BCR 10 · BBS 2026 Release · 1966–2025

Ruby-crowned Kinglet In Northern Rockies

All regionsNorthern RockiesForest birds

Ruby-crowned Kinglet in Northern Rockies has increased: up 39% on the route-weighted index since 1970.

+39%Since 1970TrendPercent 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 →
155Routes 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 →
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 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-crowned Kinglet in Northern Rockies. See the full index history below.

Ruby-crowned Kinglet In Northern Rockies Population Forecast

If the recent trend holds, Ruby-crowned Kinglet in Northern Rockies is projected to rise about 32% by 2030 — from 5.8 in 2025 to a central estimate of 7.7 (95% range 4.9–10). A 5-year backtest shows a typical error of ±38%, with 100% of held-out values landing inside the 95% band.

+32%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 →
7.7Projected 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 →
4.9–1095% 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 →
±38%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-crowned Kinglet in Northern Rockies is projected to rise about 32% by 2030 — from 5.8 in 2025 to a central estimate of 7.7 (95% range 4.9–10). A 5-year backtest shows a typical error of ±38%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20267.44.610
20277.54.710
20287.54.710
20297.64.810
20307.74.910

Routes In Northern Rockies

Routes recording Ruby-crowned Kinglet in Northern Rockies.
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 →
YellowstoneWYOMING492025
AlpineWYOMING432025
Pagil GulchMONTANA422025
Crazy WomanWYOMING412024
CloverlandWASHINGTON322025
Colter Bay 2WYOMING322025
CobaltIDAHO312025
Hebgen LakeMONTANA302025
WoodmanMONTANA292025
Colter BayWYOMING291999
Fiddler LkWYOMING292025
Lolo PassIDAHO282019
Black Mtn.OREGON282004
Soda LakeWYOMING282025
SulaMONTANA262024
WoodruffUTAH262025
Hunter PeakWYOMING262025
BurgdorfIDAHO252025
Pryor Mtn.MONTANA252025
Skalkho-RyeMONTANA232022
Cramer CreekMONTANA232019
Horse CreekWYOMING222025
Cape HornIDAHO192025
Greenoagh 3MONTANA182025
DesolationOREGON172025

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