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

Great Horned Owl In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGeneralists

Great Horned Owl in Northern Pacific Rainforest has edged up: up 16% on the route-weighted index since 1970.

+16%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 →
67Routes 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 →
54YearsYears 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 Great Horned Owl in Northern Pacific Rainforest. See the full index history below.

Forecast

If the recent trend holds, Great Horned Owl in Northern Pacific Rainforest is projected to fall about 58% by 2029 — from 0.11 in 2024 to a central estimate of 0.04 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±38.2%, with 100% of held-out values landing inside the 95% band.

-58%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 →
0.04Projected 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 →
0.00–0.1295% 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 →
±38.2%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, Great Horned Owl in Northern Pacific Rainforest is projected to fall about 58% by 2029 — from 0.11 in 2024 to a central estimate of 0.04 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±38.2%, 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 →
20250.050.000.12
20260.050.000.12
20270.050.000.12
20280.050.000.12
20290.040.000.12

Routes In Northern Pacific Rainforest

Routes recording Great Horned Owl 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 →
Crescent CtyCALIFORNIA31972
Junction CtyCALIFORNIA31994
Warm BeachWASHINGTON31998
Vashon Is.WASHINGTON32024
Copper RiverALASKA21995
HolmesCALIFORNIA21976
KorbelCALIFORNIA22024
GazelleCALIFORNIA22017
TualatinOREGON21976
DaytonOREGON21990
Secret ValOREGON21984
Emigrant Lake 2OREGON22017
CoquilleOREGON21994
LoraneOREGON22023
ScappooseOREGON21995
TaholahWASHINGTON22003
CamasWASHINGTON21992
Mendota 3WASHINGTON22005
Sheep MtnALASKA12017
Zimovia StrtALASKA12004
Harlequin L.ALASKA11997
Horse CreekCALIFORNIA12007
HoneydewCALIFORNIA11996
HullvilleCALIFORNIA12015
Fish RockCALIFORNIA11969

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