BirdAnalyst
Species · Wyoming · BBS 2025 Release · 1966–2024

Ruddy Duck Population Trend in Wyoming

All statesWaterfowl

Ruddy Duck in Wyoming has edged down: down 24% on the route-weighted index since 1977.

-24%Since 1977TrendPercent 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 StateSurvey 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 Ruddy Duck Trends in WyomingNotable 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 Ruddy Duck in Wyoming. See the full index history below.

Ruddy Duck Population Forecast in Wyoming

If the recent trend holds, Ruddy Duck in Wyoming is projected to rise about 56% by 2029 — from 0.10 in 2024 to a central estimate of 0.16 (95% range 0.00–0.32). A 5-year backtest shows a typical error of ±46.6%, with 100% of held-out values landing inside the 95% band.

+56%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 →
0.16Projected 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 →
0.00–0.3295% 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 →
±46.6%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, Ruddy Duck in Wyoming is projected to rise about 56% by 2029 — from 0.10 in 2024 to a central estimate of 0.16 (95% range 0.00–0.32). A 5-year backtest shows a typical error of ±46.6%, with 100% of held-out values landing inside the 95% band.19722029
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 →
20250.160.000.32
20260.160.000.32
20270.160.000.32
20280.160.000.32
20290.160.000.32

Ruddy Duck Survey Routes in Wyoming

Routes recording Ruddy Duck in Wyoming.
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 →
Natrona819911981
Hunter Peak820101982
Carter 2520242018
Seedskadee520151994
Ne Entrance420211998
Bucknum420181995
Clarkelen319781978
Lamont320041987
Pathfinder320222016
Mtn View319911989
Rock River320162016
Nowood220242024
Brookhurst220171972
Sybille Cyn220152015
Yellowstone120151988
Mammoth120241983
Clark120241992
Lovell120182001
Recluse120072000
Riverview120221991
Walcott120212006

Ruddy Duck Population Trend in Other States

arizonacaliforniacoloradoidahoillinoisindianaiowakansasmichiganminnesotamontananebraskanevadanew-mexiconew-yorknorth-dakotaohiooklahomaoregonsouth-dakotatexasutahwashingtonwisconsin

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