BirdAnalyst
Species · New Hampshire · BBS 2025 Release · 1966–2024

Rusty Blackbird Population Trend in New Hampshire

All statesGeneralists

Rusty Blackbird in New Hampshire has fallen sharply: down 69% on the route-weighted index since 1968.

-69%Since 1968TrendPercent 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 →
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 Rusty Blackbird Trends in New HampshireNotable 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 →

Rusty Blackbird has fallen sharply in New Hampshire: down 69% on the route-weighted index since 1968.

Rusty Blackbird Survey Routes in New Hampshire

Routes recording Rusty Blackbird in New Hampshire.
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 →
Milan419731966
Fitzwilliam219811981
Wilmot119751975
Crawford Not119701967
Jefferson Hl119701968
Franconia119931966
Dixvil Notch119731967
Clarksville119991967

Rusty Blackbird Population Trend in Other States

alaskamainemichiganminnesotanew-jerseynew-yorkvermont

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