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Species · BCR 12 · BBS 2025 Release · 1966–2024

Nelson's Sparrow In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionGeneralists

Nelson's Sparrow in Boreal Hardwood Transition has increased: up 25% on the route-weighted index since 2005.

+25%Since 2005TrendPercent 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 →
3Routes 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 →
14YearsYears 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 Nelson's Sparrow in Boreal Hardwood Transition. See the full index history below.

Routes In Boreal Hardwood Transition

Routes recording Nelson's Sparrow in Boreal Hardwood Transition.
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 →
McgregorMINNESOTA12005
WarroadMINNESOTA11997
GreenbushMINNESOTA12024

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