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

Loggerhead Shrike In Badlands and Prairies

All regionsBadlands and PrairiesGrassland birds

Loggerhead Shrike in Badlands and Prairies has edged down: down 22% on the route-weighted index since 1969.

-22%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 →
112Routes 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 Loggerhead Shrike in Badlands and Prairies. See the full index history below.

Loggerhead Shrike In Badlands and Prairies Population Forecast

If the recent trend holds, Loggerhead Shrike in Badlands and Prairies is projected to fall about 59% by 2030 — from 2.1 in 2025 to a central estimate of 0.85 (95% range 0.00–1.8). A 5-year backtest shows a typical error of ±53.6%, with 40% of held-out values landing inside the 95% band.

-59%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 →
0.85Projected 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 →
0.00–1.895% 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 →
±53.6%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, Loggerhead Shrike in Badlands and Prairies is projected to fall about 59% by 2030 — from 2.1 in 2025 to a central estimate of 0.85 (95% range 0.00–1.8). A 5-year backtest shows a typical error of ±53.6%, with 40% 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 →
20260.930.001.9
20270.910.001.9
20280.890.001.8
20290.870.001.8
20300.850.001.8

Routes In Badlands and Prairies

Routes recording Loggerhead Shrike 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 →
IsabelSOUTH-DAKOTA262015
Eagle ButteSOUTH-DAKOTA222015
Thunder BasinWYOMING152025
NewcastleWYOMING142025
HardingSOUTH-DAKOTA132025
LindsayMONTANA82024
MaurineSOUTH-DAKOTA82025
UptonWYOMING82025
IngomarMONTANA72025
SchoonoverWYOMING72025
Teapot DomeWYOMING71989
RiverviewWYOMING72025
BrusettMONTANA62024
RevaSOUTH-DAKOTA62025
RedbirdWYOMING61989
CircleMONTANA52023
AlbionMONTANA52025
ShawneeWYOMING52025
JordanMONTANA42024
LocateMONTANA42025
Cabin CreekMONTANA42025
Ft YatesNORTH-DAKOTA42003
ZapNORTH-DAKOTA42024
MarcusSOUTH-DAKOTA42013
WyarnoWYOMING42025

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