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Species · Delaware · BBS 2026 Release · 1966–2025

Brown-headed Nuthatch Population Trend in Delaware

All statesForest birds

Brown-headed Nuthatch in Delaware has surged: up 363% on the route-weighted index since 1978.

+363%Since 1978TrendPercent 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 →
6Routes 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 →
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 Brown-headed Nuthatch Trends in DelawareNotable 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 increasecomputed 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 →

Brown-headed Nuthatch has surged in Delaware: up 363% on the route-weighted index since 1978.

Brown-headed Nuthatch Survey Routes in Delaware

Routes recording Brown-headed Nuthatch in Delaware.
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 →
Harrington220252025
Frankford219781976
Pepperbox220161998
Pepperbox 2220252017
Holleyville119751975
Georgetown120212021

Brown-headed Nuthatch Population Trend in Other States

alabamaarkansasfloridageorgialouisianamarylandmississippinorth-carolinaoklahomasouth-carolinatennesseetexasvirginia

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.