BirdAnalyst
Species · BCR 5 · BBS 2025 Release · 1966–2024

Cassin's Vireo In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestForest birds

Cassin's Vireo in Northern Pacific Rainforest has edged down: down 19% on the route-weighted index since 1970.

-19%Since 1970
114Routes In Region
56Years

Notable Signals

No notable trend signals for Cassin's Vireo in Northern Pacific Rainforest. See the full index history below.

Forecast

If the recent trend holds, Cassin's Vireo in Northern Pacific Rainforest is projected to rise about 98% by 2029 — from 1.0 in 2024 to a central estimate of 2.0 (95% range 0.33–3.7). A 5-year backtest shows a typical error of ±142.9%, with 40% of held-out values landing inside the 95% band.

+98%Change by 2029
2.0Projected 2029 index
0.33–3.795% range
±142.9%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
20252.10.423.8
20262.10.403.8
20272.10.383.8
20282.10.353.7
20292.00.333.7

Routes In Northern Pacific Rainforest

Routes recording Cassin's Vireo in Northern Pacific Rainforest.
Horse CreekCALIFORNIA442019
Orleans 2CALIFORNIA232014
AlderpointCALIFORNIA212012
Martins FyCALIFORNIA172009
LongvaleCALIFORNIA142023
RuchOREGON142023
Shasta LakeCALIFORNIA122024
Friday RidgeCALIFORNIA122024
HullvilleCALIFORNIA112019
Secret ValOREGON112022
ProspectOREGON112024
OrleansCALIFORNIA102012
Hay ForkCALIFORNIA102017
CecilvilleCALIFORNIA82017
SelmaOREGON82024
HolmesCALIFORNIA72024
WhiskeytownCALIFORNIA62007
Pilot CreekCALIFORNIA61996
CamasWASHINGTON62009
Offield MtnCALIFORNIA52014
Mt ShastaCALIFORNIA52019
KorbelCALIFORNIA52024
UkiahCALIFORNIA52011
Burnt RanchCALIFORNIA52016
HoneydewCALIFORNIA42017

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