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

Tree Swallow In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestAerial insectivores

Tree Swallow in Northern Pacific Rainforest has declined: down 43% on the route-weighted index since 1970.

-43%Since 1970
149Routes In Region
56Years

Notable Signals

No notable trend signals for Tree Swallow in Northern Pacific Rainforest. See the full index history below.

Forecast

If the recent trend holds, Tree Swallow in Northern Pacific Rainforest is projected to rise about 15% by 2029 — from 3.1 in 2024 to a central estimate of 3.6 (95% range 1.5–5.7). A 5-year backtest shows a typical error of ±20.2%, with 100% of held-out values landing inside the 95% band.

+15%Change by 2029
3.6Projected 2029 index
1.5–5.795% range
±20.2%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
20253.81.75.9
20263.81.75.9
20273.71.65.8
20283.71.65.8
20293.61.55.7

Routes In Northern Pacific Rainforest

Routes recording Tree Swallow in Northern Pacific Rainforest.
Horse CreekCALIFORNIA702019
Moose PassALASKA391985
MolallaOREGON392005
CoquilleOREGON322024
CamasWASHINGTON282009
CougarWASHINGTON262023
DerbyOREGON251993
CordovaALASKA242024
RuchOREGON212023
Sitka (Short)ALASKA191992
Emigrant LkOREGON172001
IlwacoWASHINGTON172024
HoneydewCALIFORNIA162017
Orleans 2CALIFORNIA162014
RainierWASHINGTON162019
Bodega BayCALIFORNIA142011
WinberryOREGON132021
WedderburnOREGON132024
GlasgowOREGON132024
DeceptionWASHINGTON122018
Crescent CtyCALIFORNIA112024
AdairOREGON112023
DaytonOREGON112024
YrekaCALIFORNIA102019
Burnt RanchCALIFORNIA102016

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