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

Savannah Sparrow In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGrassland birds

Savannah Sparrow in Northern Pacific Rainforest has held roughly steady: down 6% on the route-weighted index since 1970.

-6%Since 1970TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
100Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

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

Savannah Sparrow In Northern Pacific Rainforest Population Forecast

If the recent trend holds, Savannah Sparrow in Northern Pacific Rainforest is projected to rise about 21% by 2029 — from 3.3 in 2024 to a central estimate of 4.0 (95% range 1.8–6.1). A 5-year backtest shows a typical error of ±48.5%, with 100% of held-out values landing inside the 95% band.

+21%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
4.0Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
1.8–6.195% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±48.5%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Savannah Sparrow in Northern Pacific Rainforest is projected to rise about 21% by 2029 — from 3.3 in 2024 to a central estimate of 4.0 (95% range 1.8–6.1). A 5-year backtest shows a typical error of ±48.5%, with 100% of held-out values landing inside the 95% band.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 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20254.01.96.2
20264.01.96.2
20274.01.96.1
20284.01.86.1
20294.01.86.1

Routes In Northern Pacific Rainforest

Routes recording Savannah Sparrow in Northern Pacific Rainforest.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Port AngelesWASHINGTON462024
Bay ViewWASHINGTON292017
AdairOREGON272024
SalemOREGON212024
South ElmaWASHINGTON172024
DaytonOREGON162024
McminnvilleOREGON162024
CamasWASHINGTON162009
UmpquaOREGON152024
MendotaWASHINGTON151988
Mendota 2WASHINGTON152000
Moose PassALASKA141992
Elmendorf (Short)ALASKA121985
Warm BeachWASHINGTON122017
Thompson PasALASKA102024
Rio DellCALIFORNIA102012
CarnationWASHINGTON102024
McchordWASHINGTON102015
Sheep MtnALASKA92017
Warm Beach 2WASHINGTON92024
Copper RiverALASKA82011
YrekaCALIFORNIA82019
EverettWASHINGTON82024
HoneydewCALIFORNIA72017
CordovaALASKA62024

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