BirdAnalyst
Species · South Dakota · BBS 2025 Release · 1966–2024

Cassin's Finch Population Trend in South Dakota

All statesGeneralists

Cassin's Finch in South Dakota has declined: down 36% on the route-weighted index since 1996.

-36%Since 1996TrendPercent 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 →
8Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
12YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Cassin's Finch Trends in South DakotaNotable 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 Cassin's Finch in South Dakota. See the full index history below.

Cassin's Finch Survey Routes in South Dakota

Routes recording Cassin's Finch in South Dakota.
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 →
Black Fox420172017
Hazelrodt320101994
Long Draw220011995
Elk Mountain219951995
Lightning Cr120171999
Pleasant Val120221995
Englewood119971997
Custer119961996

Cassin's Finch Population Trend in Other States

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