BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Ruby-crowned Kinglet In Great Basin

All regionsGreat BasinForest birds

Ruby-crowned Kinglet in Great Basin has increased: up 43% on the route-weighted index since 1972.

+43%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 →
66Routes 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 →
54YearsYears 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 48% by 2029 — from 0.33 in 2024 to a central estimate of 0.49 (95% range 0.18–0.79). A 5-year backtest shows a typical error of ±51.8%, with 100% of held-out values landing inside the 95% band.

+48%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 →
0.49Projected 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 →
0.18–0.7995% 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 →
±51.8%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 48% by 2029 — from 0.33 in 2024 to a central estimate of 0.49 (95% range 0.18–0.79). A 5-year backtest shows a typical error of ±51.8%, with 100% 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 →
20250.470.170.78
20260.480.170.78
20270.480.180.79
20280.480.180.79
20290.490.180.79

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 →
SquirrelIDAHO282024
Magic MtnIDAHO92024
Barnes ValOREGON81984
JarbidgeNEVADA72014
Lake ChelanWASHINGTON72019
OrdnanceOREGON61975
MadelineCALIFORNIA42002
Silver CityIDAHO42024
CarltonWASHINGTON42022
Fish LakeOREGON32014
ZumwaltOREGON32005
NewcastleUTAH32021
NighthawkWASHINGTON31992
LikelyCALIFORNIA21973
Dell SpringOREGON21984
Camp ShermanOREGON21994
Davis LakeOREGON22007
SistersOREGON22024
PauninaOREGON22012
ArdenvoirWASHINGTON21972
ReardanWASHINGTON21969
RimrockWASHINGTON21969
AsotinWASHINGTON22024
LeavenworthWASHINGTON21981
Suiattle RivWASHINGTON22003

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