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

Merlin In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGeneralists

Merlin in Northern Pacific Rainforest has increased: up 29% on the route-weighted index since 1989.

+29%Since 1989TrendPercent 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 →
21Routes 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 →
24YearsYears 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 Merlin in Northern Pacific Rainforest. See the full index history below.

Merlin In Northern Pacific Rainforest Population Forecast

If the recent trend holds, Merlin in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.04). A 5-year backtest shows a typical error of ±41.5%, with 80% of held-out values landing inside the 95% band.

n/aChange 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 →
0.02Projected 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 →
0.00–0.0495% 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 →
±41.5%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, Merlin in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.04). A 5-year backtest shows a typical error of ±41.5%, with 80% of held-out values landing inside the 95% band.19792029
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 →
20250.020.000.04
20260.020.000.04
20270.020.000.04
20280.020.000.04
20290.020.000.04

Routes In Northern Pacific Rainforest

Routes recording Merlin 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 →
HainesALASKA22023
CordovaALASKA22024
Sheep MtnALASKA22011
JuneauALASKA12014
CraigALASKA12009
Thompson PasALASKA12005
HopeALASKA12011
Thorne Bay 2ALASKA12016
Zimovia StrtALASKA11998
Harlequin L.ALASKA12018
Whale PassALASKA12013
SkagwayALASKA12021
HyderALASKA12003
Alpenglow (Short)ALASKA12012
Copper RiverALASKA12010
Stikine RiverALASKA11998
GarfieldOREGON11979
OzetteWASHINGTON12007
Port AngelesWASHINGTON12008
MukilteoWASHINGTON12024
Mt. AdamsWASHINGTON12010

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