BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Loggerhead Shrike In Badlands and Prairies

All regionsBadlands and PrairiesGeneralists

Loggerhead Shrike in Badlands and Prairies has declined: down 32% on the route-weighted index since 1969.

-32%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 →
57YearsYears 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 58% by 2029 — from 1.9 in 2024 to a central estimate of 0.78 (95% range 0.00–1.7). A 5-year backtest shows a typical error of ±42%, with 60% of held-out values landing inside the 95% band.

-58%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 →
0.78Projected 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 →
0.00–1.795% 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 →
±42%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 58% by 2029 — from 1.9 in 2024 to a central estimate of 0.78 (95% range 0.00–1.7). A 5-year backtest shows a typical error of ±42%, with 60% of held-out values landing inside the 95% band.19672029
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 →
20250.870.001.8
20260.850.001.8
20270.820.001.7
20280.800.001.7
20290.780.001.7

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
NewcastleWYOMING122024
UptonWYOMING102024
SavageMONTANA92021
SchoonoverWYOMING92024
LindsayMONTANA82024
RevaSOUTH-DAKOTA82024
Oglala Nat. Grass.NEBRASKA72023
MaurineSOUTH-DAKOTA72024
Teapot DomeWYOMING71989
BrusettMONTANA62024
IngomarMONTANA62024
Wheat BasinMONTANA62024
RedbirdWYOMING61989
ShawneeWYOMING62024
CircleMONTANA52023
ArvadaWYOMING52024
SussexWYOMING52024
JordanMONTANA42024
WinnettMONTANA42023
Ft YatesNORTH-DAKOTA42003
ZapNORTH-DAKOTA42024
MarcusSOUTH-DAKOTA42013
RiverviewWYOMING42022

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