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

Plumbeous Vireo In Badlands and Prairies

All regionsBadlands and PrairiesForest birds

Plumbeous Vireo in Badlands and Prairies has edged down: down 13% on the route-weighted index since 1969.

-13%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 →
30Routes 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 Plumbeous Vireo in Badlands and Prairies. See the full index history below.

Plumbeous Vireo In Badlands and Prairies Population Forecast

If the recent trend holds, Plumbeous Vireo in Badlands and Prairies is projected to rise about 316% by 2030 — from 0.20 in 2025 to a central estimate of 0.83 (95% range 0.30–1.4). A 5-year backtest shows a typical error of ±285.4%, with 0% of held-out values landing inside the 95% band.

+316%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 →
0.83Projected 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 →
0.30–1.495% 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 →
±285.4%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, Plumbeous Vireo in Badlands and Prairies is projected to rise about 316% by 2030 — from 0.20 in 2025 to a central estimate of 0.83 (95% range 0.30–1.4). A 5-year backtest shows a typical error of ±285.4%, with 0% 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 →
20260.800.271.3
20270.810.271.3
20280.820.281.4
20290.820.291.4
20300.830.301.4

Routes In Badlands and Prairies

Routes recording Plumbeous 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 →
Roubaix LkSOUTH-DAKOTA51991
Silver CitySOUTH-DAKOTA52012
Elk MountainSOUTH-DAKOTA52004
Lightning CrSOUTH-DAKOTA52025
CusterSOUTH-DAKOTA32025
NorbeckSOUTH-DAKOTA32002
HazelrodtSOUTH-DAKOTA32025
BrandenbergMONTANA22015
Pleasant ValSOUTH-DAKOTA22024
Hill CitySOUTH-DAKOTA22013
Long DrawSOUTH-DAKOTA22025
MoskeeWYOMING22001
Moskee 2WYOMING22021
HighwoodMONTANA11974
BrusettMONTANA11983
JordanMONTANA12024
Reed PointMONTANA12025
Flatwillow 2MONTANA12017
Miles CityMONTANA12023
Bull Mtn.MONTANA12001
EnglewoodSOUTH-DAKOTA12006
RochfordSOUTH-DAKOTA12017
Wind Cave NpSOUTH-DAKOTA12025
SundanceWYOMING12022
BillWYOMING11999

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