BirdAnalyst
Species · BCR 10 · BBS 2026 Release · 1966–2025

Wood Duck In Northern Rockies

All regionsNorthern RockiesWaterfowl

Wood Duck in Northern Rockies has surged: up 141% on the route-weighted index since 1980.

+141%Since 1980TrendPercent 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 →
35Routes 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 →
46YearsYears 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 Wood Duck in Northern Rockies. See the full index history below.

Wood Duck In Northern Rockies Population Forecast

If the recent trend holds, Wood Duck in Northern Rockies is projected to rise about 94% by 2030 — from 0.05 in 2025 to a central estimate of 0.10 (95% range 0.01–0.19). A 5-year backtest shows a typical error of ±52.2%, with 80% of held-out values landing inside the 95% band.

+94%Change by 2030TrendPercent 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 →
0.10Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.01–0.1995% 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 →
±52.2%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, Wood Duck in Northern Rockies is projected to rise about 94% by 2030 — from 0.05 in 2025 to a central estimate of 0.10 (95% range 0.01–0.19). A 5-year backtest shows a typical error of ±52.2%, with 80% of held-out values landing inside the 95% band.19762030
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 →
20260.100.010.19
20270.100.010.19
20280.100.010.19
20290.100.010.19
20300.100.010.19

Routes In Northern Rockies

Routes recording Wood Duck in Northern Rockies.
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 →
NaplesIDAHO62025
OttoWYOMING52008
Painted RockMONTANA31998
BurgdorfIDAHO22003
FeathervilleIDAHO22009
AugustaMONTANA22011
ClintonMONTANA22008
NoxonMONTANA21998
Willow Creek 2MONTANA21994
BridgeportOREGON22025
CusickWASHINGTON22024
L Pend O NwrWASHINGTON22024
ClarkWYOMING22000
LayCOLORADO12004
MivodenIDAHO12007
CentervilleIDAHO12006
CabartonIDAHO12003
Libby DamMONTANA12000
KalispellMONTANA12015
St RegisMONTANA12000
ArleeMONTANA11987
EllistonMONTANA12009
LaurelMONTANA12010
NinemileMONTANA12005
GlenMONTANA12024

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.