BirdAnalyst
Species · BCR 9 · BBS 2026 Release · 1966–2025

Ruby-crowned Kinglet In Great Basin

All regionsGreat BasinForest birds

Ruby-crowned Kinglet in Great Basin has increased: up 31% on the route-weighted index since 1972.

+31%Since 1972TrendPercent 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 →
67Routes 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 →
55YearsYears 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 Great Basin. See the full index history below.

Ruby-crowned Kinglet In Great Basin Population Forecast

If the recent trend holds, Ruby-crowned Kinglet in Great Basin is projected to rise about 25% by 2030 — from 0.41 in 2025 to a central estimate of 0.51 (95% range 0.22–0.81). A 5-year backtest shows a typical error of ±24.5%, with 100% of held-out values landing inside the 95% band.

+25%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 →
0.51Projected 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 →
0.22–0.8195% 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 →
±24.5%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 Great Basin is projected to rise about 25% by 2030 — from 0.41 in 2025 to a central estimate of 0.51 (95% range 0.22–0.81). A 5-year backtest shows a typical error of ±24.5%, with 100% of held-out values landing inside the 95% band.19692030
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 →
20260.500.200.79
20270.500.210.79
20280.510.210.80
20290.510.220.80
20300.510.220.81

Routes In Great Basin

Routes recording Ruby-crowned Kinglet in Great Basin.
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 →
SquirrelIDAHO232025
Magic MtnIDAHO222025
Barnes ValOREGON81984
JarbidgeNEVADA72014
Lake ChelanWASHINGTON72019
Silver CityIDAHO62025
OrdnanceOREGON61975
MadelineCALIFORNIA42002
CarltonWASHINGTON42022
Fish LakeOREGON32014
ZumwaltOREGON32005
NewcastleUTAH32021
NighthawkWASHINGTON31992
LikelyCALIFORNIA21973
Dell SpringOREGON21984
Camp ShermanOREGON21994
Davis LakeOREGON22007
PauninaOREGON22012
ArdenvoirWASHINGTON21972
ReardanWASHINGTON21969
RimrockWASHINGTON21969
AsotinWASHINGTON22024
LeavenworthWASHINGTON21981
Suiattle RivWASHINGTON22003
MazamaWASHINGTON22022

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