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

MacGillivray's Warbler In Great Basin

All regionsGreat BasinForest birds

MacGillivray's Warbler in Great Basin has increased: up 33% on the route-weighted index since 1970.

+33%Since 1970
109Routes In Region
56Years

Notable Signals

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

Forecast

If the recent trend holds, MacGillivray's Warbler in Great Basin is projected to stay roughly flat through 2029, near 1.9 (95% range 1.2–2.7). A 5-year backtest shows a typical error of ±16.3%, with 100% of held-out values landing inside the 95% band.

-5%Change by 2029
1.9Projected 2029 index
1.2–2.795% range
±16.3%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
20251.91.12.6
20261.91.22.6
20271.91.22.6
20281.91.22.6
20291.91.22.7

Routes In Great Basin

Routes recording MacGillivray's Warbler in Great Basin.
AustinNEVADA362018
SnowdenWASHINGTON282024
E. Mt. AdamsWASHINGTON282024
NewhalemWASHINGTON262024
Blewett PassWASHINGTON252024
Magic MtnIDAHO182024
GlacierWASHINGTON182024
Picture FlatOREGON172024
LeavenworthWASHINGTON152024
Lake ChelanWASHINGTON142024
Mt HoodOREGON132024
RimrockWASHINGTON122024
KendallWASHINGTON122024
L. WenatcheeWASHINGTON102024
Ruby ValleyNEVADA92001
Cascade RivWASHINGTON92006
RonaldWASHINGTON82024
MazamaWASHINGTON82022
ConcreteWASHINGTON82024
HawthorneNEVADA72001
White ChuckWASHINGTON72024
AlmoIDAHO62022
JarbidgeNEVADA62015
Comins LakeNEVADA62016
LakeviewOREGON62024

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