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

Vesper Sparrow In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGrassland birds

Vesper Sparrow in Northern Pacific Rainforest has collapsed: down 93% on the route-weighted index since 1970.

-93%Since 1970
23Routes In Region
53Years

Notable Signals

long arc declinecomputed index

Vesper Sparrow has collapsed in Northern Pacific Rainforest: down 93% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Vesper Sparrow in Northern Pacific Rainforest is projected to fall about 100% by 2029 — from 0.05 in 2024 to a central estimate of 0.00 (95% range 0.00–0.27). A 5-year backtest shows a typical error of ±325.4%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–0.2795% range
±325.4%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
20250.000.000.27
20260.000.000.27
20270.000.000.27
20280.000.000.27
20290.000.000.27

Routes In Northern Pacific Rainforest

Routes recording Vesper Sparrow in Northern Pacific Rainforest.
Mt ShastaCALIFORNIA42005
Emigrant LkOREGON31992
Sams ValleyOREGON32013
OrleansCALIFORNIA21972
UmpquaOREGON22021
AdairOREGON21988
Emigrant Lake 2OREGON22024
CanbyOREGON22005
CamasWASHINGTON21977
Crescent CtyCALIFORNIA11991
GazelleCALIFORNIA11989
TualatinOREGON11988
WinberryOREGON11988
ScioOREGON12024
DaytonOREGON12012
GarfieldOREGON12006
ElktonOREGON11986
GreenOREGON12024
McminnvilleOREGON12005
Port AngelesWASHINGTON11984
MendotaWASHINGTON11979
Mendota 2WASHINGTON11992
McchordWASHINGTON12001

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