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

MacGillivray's Warbler In Sierra Nevada

All regionsSierra NevadaForest birds

MacGillivray's Warbler in Sierra Nevada has held roughly steady: down 8% on the route-weighted index since 1972.

-8%Since 1972
36Routes In Region
54Years

Notable Signals

No notable trend signals for MacGillivray's Warbler in Sierra Nevada. See the full index history below.

Forecast

If the recent trend holds, MacGillivray's Warbler in Sierra Nevada is projected to rise about 100% by 2029 — from 2.4 in 2024 to a central estimate of 4.7 (95% range 2.7–6.7). A 5-year backtest shows a typical error of ±42.8%, with 60% of held-out values landing inside the 95% band.

+100%Change by 2029
4.7Projected 2029 index
2.7–6.795% range
±42.8%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
20254.62.66.6
20264.62.66.7
20274.72.76.7
20284.72.76.7
20294.72.76.7

Routes In Sierra Nevada

Routes recording MacGillivray's Warbler in Sierra Nevada.
Cottage SpgsCALIFORNIA171975
Tuolumne GroveCALIFORNIA112024
LakeshoreCALIFORNIA112024
DardanelleCALIFORNIA92019
RivertonCALIFORNIA92023
StrawberryCALIFORNIA92019
Eagle LakeCALIFORNIA62024
Greenhorn MtCALIFORNIA62008
Butte MeadowCALIFORNIA62014
Little TruckeeCALIFORNIA62022
ChesterCALIFORNIA52017
Last ChanceCALIFORNIA42019
Silver CityCALIFORNIA32013
Higgins CornCALIFORNIA31982
Tahoe NfCALIFORNIA31994
WawonaCALIFORNIA32024
Forest Hill 2CALIFORNIA32005
WestvilleCALIFORNIA22024
JohnsvilleCALIFORNIA22024
Forest HillCALIFORNIA22022
PlacervilleCALIFORNIA22024
Pine MountainCALIFORNIA22017
Bass LakeCALIFORNIA12011
WoodfordsCALIFORNIA12024
LumberyardCALIFORNIA12024

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