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

Northern Rough-winged Swallow In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestAerial insectivores

Northern Rough-winged Swallow in Northern Pacific Rainforest has fallen sharply: down 58% on the route-weighted index since 1970.

-58%Since 1970
104Routes In Region
56Years

Notable Signals

long arc declinecomputed index

Northern Rough-winged Swallow has fallen sharply in Northern Pacific Rainforest: down 58% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Northern Rough-winged Swallow in Northern Pacific Rainforest is projected to rise about 58% by 2029 — from 0.32 in 2024 to a central estimate of 0.51 (95% range 0.00–1.3). A 5-year backtest shows a typical error of ±36.4%, with 100% of held-out values landing inside the 95% band.

+58%Change by 2029
0.51Projected 2029 index
0.00–1.395% range
±36.4%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
20250.610.001.4
20260.580.001.4
20270.560.001.4
20280.530.001.3
20290.510.001.3

Routes In Northern Pacific Rainforest

Routes recording Northern Rough-winged Swallow in Northern Pacific Rainforest.
Sandy RiverOREGON252004
Horse CreekCALIFORNIA222019
Fish RockCALIFORNIA122014
Secret ValOREGON112022
KorbelCALIFORNIA102021
HyderALASKA92007
Martins FyCALIFORNIA82006
OrleansCALIFORNIA82012
CougarWASHINGTON82023
LongvaleCALIFORNIA72023
WhiskeytownCALIFORNIA72007
OzetteWASHINGTON62024
Hay ForkCALIFORNIA52017
WedderburnOREGON52019
SalemOREGON52015
South ElmaWASHINGTON52024
Orleans 2CALIFORNIA42014
Port AngelesWASHINGTON42024
TaholahWASHINGTON42022
Pe EllWASHINGTON42012
RainierWASHINGTON42005
HolmesCALIFORNIA32022
Junction CtyCALIFORNIA32012
TimberOREGON31989
AdairOREGON31981

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