BirdAnalyst
Species · BCR 30 · BBS 2026 Release · 1966–2025

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 150% on the route-weighted index since 1968.

+150%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 →
59YearsYears 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 150% 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 46% by 2030 — from 0.43 in 2025 to a central estimate of 0.63 (95% range 0.18–1.1). A 5-year backtest shows a typical error of ±45.8%, with 100% of held-out values landing inside the 95% band.

+46%Change by 2030TrendPercent 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 →
0.63Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.18–1.195% 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 →
±45.8%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 46% by 2030 — from 0.43 in 2025 to a central estimate of 0.63 (95% range 0.18–1.1). A 5-year backtest shows a typical error of ±45.8%, with 100% of held-out values landing inside the 95% band.19662030
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 →
20260.610.161.1
20270.620.171.1
20280.620.171.1
20290.630.181.1
20300.630.181.1

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 →
ChilmarkMASSACHUSETTS101983
BlackbirdDELAWARE82025
Pepperbox 2DELAWARE82025
Del HavenNEW-JERSEY71991
MysticCONNECTICUT52000
Bethany BchDELAWARE51990
CokesburyMARYLAND52025
WesthamptonNEW-YORK42005
DoverDELAWARE31979
Golden HillMARYLAND32004
Cape May ChNEW-JERSEY32013
Block IslandRHODE-ISLAND32025
Mt PleasantDELAWARE21998
WilmingtonDELAWARE21993
HarringtonDELAWARE22025
PepperboxDELAWARE22003
Pt RepublicMARYLAND21985
EastonMARYLAND21976
HongaMARYLAND22025
MadisonMARYLAND22025
NewarkMARYLAND22024
WellfleetMASSACHUSETTS21992
BrocktonMASSACHUSETTS21977
HuntingtonNEW-YORK22023
Sachuest PtRHODE-ISLAND21990

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.