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

Cerulean Warbler In Atlantic Northern Forest

All regionsAtlantic Northern ForestForest birds

Cerulean Warbler in Atlantic Northern Forest has surged: up 79% on the route-weighted index since 1978.

+79%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 →
8Routes 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 Cerulean Warbler in Atlantic Northern Forest. See the full index history below.

Routes In Atlantic Northern Forest

Routes recording Cerulean Warbler 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 →
SheffieldMASSACHUSETTS32022
HighmarketNEW-YORK21999
S WallingfrdVERMONT22006
CummingtonMASSACHUSETTS12014
ChesterfieldMASSACHUSETTS11988
GlenNEW-HAMPSHIRE11993
NewcombNEW-YORK11972
W RutlandVERMONT11988

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