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

Evening Grosbeak In Badlands and Prairies

All regionsBadlands and PrairiesGeneralists

Evening Grosbeak in Badlands and Prairies has collapsed: down 93% on the route-weighted index since 1981.

-93%Since 1981TrendPercent 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 →
9Routes 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 →
17YearsYears 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 →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Evening Grosbeak has collapsed in Badlands and Prairies: down 93% on the route-weighted index since 1981.

Routes In Badlands and Prairies

Routes recording Evening Grosbeak 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 →
BrandenbergMONTANA81968
ShawmutMONTANA41999
Moskee 2WYOMING22016
Reed PointMONTANA11998
Maynard CouleeMONTANA12017
Bull Mtn.MONTANA12001
Roubaix LkSOUTH-DAKOTA11986
EnglewoodSOUTH-DAKOTA12011
Wind Cave NpSOUTH-DAKOTA12003

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