BirdAnalyst
Species · BCR 30 · BBS 2025 Release · 1966–2024

Snowy Egret In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastWetland birds

Snowy Egret in New England / Mid-Atlantic Coast has surged: up 161% on the route-weighted index since 1968.

+161%Since 1968TrendPercent 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 →
50Routes 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 →
58YearsYears 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 →

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 →

Snowy Egret has surged in New England / Mid-Atlantic Coast: up 161% on the route-weighted index since 1968.

Snowy Egret In New England / Mid-Atlantic Coast Population Forecast

If the recent trend holds, Snowy Egret in New England / Mid-Atlantic Coast is projected to rise about 43% by 2029 — from 0.45 in 2024 to a central estimate of 0.64 (95% range 0.19–1.1). A 5-year backtest shows a typical error of ±55.7%, with 100% of held-out values landing inside the 95% band.

+43%Change by 2029TrendPercent 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 →
0.64Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.19–1.195% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±55.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Snowy Egret in New England / Mid-Atlantic Coast is projected to rise about 43% by 2029 — from 0.45 in 2024 to a central estimate of 0.64 (95% range 0.19–1.1). A 5-year backtest shows a typical error of ±55.7%, with 100% of held-out values landing inside the 95% band.19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.620.171.1
20260.630.181.1
20270.630.181.1
20280.640.191.1
20290.640.191.1

Routes In New England / Mid-Atlantic Coast

Routes recording Snowy Egret in New England / Mid-Atlantic Coast.
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 →
HongaMARYLAND102024
ChilmarkMASSACHUSETTS101983
Ocean CityNEW-JERSEY102024
Del HavenNEW-JERSEY71991
MysticCONNECTICUT52000
Bethany BchDELAWARE51990
BlackbirdDELAWARE42024
WesthamptonNEW-YORK42005
HarringtonDELAWARE32024
DoverDELAWARE31979
Golden HillMARYLAND32004
Cape May ChNEW-JERSEY32013
Mt PleasantDELAWARE21998
WilmingtonDELAWARE21993
PepperboxDELAWARE22003
Pepperbox 2DELAWARE22024
Pt RepublicMARYLAND21985
EastonMARYLAND21976
CokesburyMARYLAND22024
NewarkMARYLAND22024
WellfleetMASSACHUSETTS21992
BrocktonMASSACHUSETTS21977
HuntingtonNEW-YORK22023
Sachuest PtRHODE-ISLAND21990
Chincoteag WVIRGINIA22022

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