BirdAnalyst
Species · Delaware · BBS 2025 Release · 1966–2024

Little Blue Heron Population Trend in Delaware

All statesWetland birds

Little Blue Heron in Delaware has edged up: up 21% on the route-weighted index since 1974.

+21%Since 1974TrendPercent 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 →
7Routes 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 Little Blue Heron 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 →

No notable trend signals for Little Blue Heron in Delaware. See the full index history below.

Little Blue Heron Survey Routes in Delaware

Routes recording Little Blue Heron 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 →
Mt Pleasant120102010
Wilmington120141967
Frankford119721972
Lowes Xrds119751975
Bethany Bch119751975
Milton119741974
Blackbird120092001

Little Blue Heron Population Trend in Other States

alabamaarkansasconnecticutfloridageorgiaillinoiskansaskentuckylouisianamarylandmassachusettsmississippimissourinew-jerseynew-yorknorth-carolinanorth-dakotaoklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvirginia

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