BirdAnalyst
Species · BCR 18 · BBS 2025 Release · 1966–2024

Red-eyed Vireo In Shortgrass Prairie

All regionsShortgrass PrairieForest birds

Red-eyed Vireo in Shortgrass Prairie has held roughly steady: down 5% on the route-weighted index since 1980.

-5%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 →
10Routes 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 →
39YearsYears 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 Shortgrass Prairie. See the full index history below.

Forecast

If the recent trend holds, Red-eyed Vireo in Shortgrass Prairie is projected to fall about 31% by 2029 — from 0.17 in 2024 to a central estimate of 0.12 (95% range 0.00–0.36). A 5-year backtest shows a typical error of ±128.4%, with 100% of held-out values landing inside the 95% band.

-31%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 →
0.12Projected 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 →
0.00–0.3695% 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 →
±128.4%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, Red-eyed Vireo in Shortgrass Prairie is projected to fall about 31% by 2029 — from 0.17 in 2024 to a central estimate of 0.12 (95% range 0.00–0.36). A 5-year backtest shows a typical error of ±128.4%, with 100% of held-out values landing inside the 95% band.19752029
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 →
20250.130.000.37
20260.120.000.37
20270.120.000.36
20280.120.000.36
20290.120.000.36

Routes In Shortgrass Prairie

Routes recording Red-eyed Vireo in Shortgrass Prairie.
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 →
Pine RidgeNEBRASKA82024
CrawfordNEBRASKA62024
KiowaCOLORADO22007
KimballNEBRASKA22021
BoyeroCOLORADO11995
Fort MorganCOLORADO11996
DaltonNEBRASKA12004
Murray LakeNEBRASKA12017
Agate 2NEBRASKA12022
LingleWYOMING11982

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