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

Yellow-crowned Night Heron Population Trend in Missouri

All statesWetland birds

Yellow-crowned Night Heron in Missouri has fallen sharply: down 64% on the route-weighted index since 1983.

-64%Since 1983TrendPercent 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 →
10Routes 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 Yellow-crowned Night Heron Trends in MissouriNotable 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 Yellow-crowned Night Heron in Missouri. See the full index history below.

Yellow-crowned Night Heron Survey Routes in Missouri

Routes recording Yellow-crowned Night Heron in Missouri.
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 →
Peace Valley219961996
Deventer119841981
Pineville120142014
Cp Girardeau119691969
Graniteville120051988
Crane120032003
Gerald120172017
Moselle120002000
Rockingham119921992
Stet119831983

Yellow-crowned Night Heron Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianakansaskentuckylouisianamarylandmississippinew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniasouth-carolinatennesseetexasvirginiawest-virginia

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