BirdAnalyst
Species · BCR 17 · BBS 2026 Release · 1966–2025

Red-eyed Vireo In Badlands and Prairies

All regionsBadlands and PrairiesForest birds

Red-eyed Vireo in Badlands and Prairies has declined: down 28% on the route-weighted index since 1969.

-28%Since 1969TrendPercent 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 →
61Routes 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 →
58YearsYears 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 Red-eyed Vireo in Badlands and Prairies. See the full index history below.

Red-eyed Vireo In Badlands and Prairies Population Forecast

If the recent trend holds, Red-eyed Vireo in Badlands and Prairies is projected to rise about 31% by 2030 — from 0.31 in 2025 to a central estimate of 0.41 (95% range 0.06–0.76). A 5-year backtest shows a typical error of ±34.9%, with 100% of held-out values landing inside the 95% band.

+31%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 →
0.41Projected 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 →
0.06–0.7695% 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 →
±34.9%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, Red-eyed Vireo in Badlands and Prairies is projected to rise about 31% by 2030 — from 0.31 in 2025 to a central estimate of 0.41 (95% range 0.06–0.76). A 5-year backtest shows a typical error of ±34.9%, with 100% of held-out values landing inside the 95% band.19672030
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 →
20260.410.070.76
20270.410.070.76
20280.410.060.76
20290.410.060.76
20300.410.060.76

Routes In Badlands and Prairies

Routes recording Red-eyed Vireo in Badlands and Prairies.
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 →
Roosevelt PkNORTH-DAKOTA142019
Moskee 3WYOMING112025
RosebudSOUTH-DAKOTA82009
Lightning CrSOUTH-DAKOTA81998
BentleyNORTH-DAKOTA62023
PromiseSOUTH-DAKOTA52012
Silver CitySOUTH-DAKOTA51999
SundanceWYOMING52025
Dunn CenterNORTH-DAKOTA42012
MoskeeWYOMING42001
Oglala Nat. Grass.NEBRASKA32011
ChamberlainSOUTH-DAKOTA32011
Two DotMONTANA21980
GorhamNORTH-DAKOTA22017
GolvaNORTH-DAKOTA22017
SolenNORTH-DAKOTA22025
WinnerSOUTH-DAKOTA22025
VolunteerSOUTH-DAKOTA21974
CusterSOUTH-DAKOTA22025
Moskee 2WYOMING22021
HighwoodMONTANA11996
BrusettMONTANA11987
SavageMONTANA12021
ForsythMONTANA12017
LocateMONTANA11984

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