BirdAnalyst
Species · BCR 15 · BBS 2025 Release · 1966–2024

Ruby-crowned Kinglet In Sierra Nevada

All regionsSierra NevadaForest birds

Ruby-crowned Kinglet in Sierra Nevada has collapsed: down 84% on the route-weighted index since 1972.

-84%Since 1972
25Routes In Region
41Years

Notable Signals

long arc declinecomputed index

Ruby-crowned Kinglet has collapsed in Sierra Nevada: down 84% on the route-weighted index since 1972.

Forecast

If the recent trend holds, Ruby-crowned Kinglet in Sierra Nevada is projected to fall about 100% by 2029 — from 0.05 in 2024 to a central estimate of 0.00 (95% range 0.00–0.86). A 5-year backtest shows a typical error of ±344.9%, with 80% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–0.8695% range
±344.9%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.000.000.86
20260.000.000.86
20270.000.000.86
20280.000.000.86
20290.000.000.86

Routes In Sierra Nevada

Routes recording Ruby-crowned Kinglet in Sierra Nevada.
GeneseeCALIFORNIA82019
JohnsvilleCALIFORNIA62019
Last ChanceCALIFORNIA42019
Hat CreekCALIFORNIA31991
LakeshoreCALIFORNIA32004
Meadow ValleyCALIFORNIA32021
Cottage SpgsCALIFORNIA21968
DardanelleCALIFORNIA22006
Bass LakeCALIFORNIA21981
LumberyardCALIFORNIA21997
Silver CityCALIFORNIA21980
Kings CanyonCALIFORNIA21985
Tahoe NfCALIFORNIA21993
Lassen ParkCALIFORNIA11978
Eagle LakeCALIFORNIA11987
WestvilleCALIFORNIA12021
WoodfordsCALIFORNIA12001
SattleyCALIFORNIA12006
Butte MeadowCALIFORNIA11979
DownievilleCALIFORNIA12024
RivertonCALIFORNIA11991
GoumazCALIFORNIA11999
Little TruckeeCALIFORNIA11997
Forest HillCALIFORNIA12008
Pollock PinesCALIFORNIA12008

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