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Species · BCR 14 · BBS 2025 Release · 1966–2024

Black-crowned Night Heron In Atlantic Northern Forest

All regionsAtlantic Northern ForestWetland birds

Black-crowned Night Heron in Atlantic Northern Forest has declined: down 33% on the route-weighted index since 1976.

-33%Since 1976TrendPercent 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 →
9Routes 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 →
13YearsYears 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 Black-crowned Night Heron in Atlantic Northern Forest. See the full index history below.

Routes In Atlantic Northern Forest

Routes recording Black-crowned Night Heron in Atlantic Northern Forest.
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 →
UnderwoodNEW-YORK31987
NewcastleMAINE11995
HancockMAINE11977
WashburnMAINE11994
St DavidMAINE11992
LempsterNEW-HAMPSHIRE11990
StratfordNEW-HAMPSHIRE11975
Dixvil NotchNEW-HAMPSHIRE11976
SabattisNEW-YORK11969

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