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

Prothonotary Warbler In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastForest birds

Prothonotary Warbler in New England / Mid-Atlantic Coast has surged: up 150% on the route-weighted index since 1968.

+150%Since 1968
65Routes In Region
58Years

Notable Signals

long arc increasecomputed index

Prothonotary Warbler has surged in New England / Mid-Atlantic Coast: up 150% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Prothonotary Warbler in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2029, near 0.62 (95% range 0.42–0.82). A 5-year backtest shows a typical error of ±13.4%, with 80% of held-out values landing inside the 95% band.

+7%Change by 2029
0.62Projected 2029 index
0.42–0.8295% range
±13.4%Backtest error
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 index95% low95% high
20250.600.390.80
20260.600.400.81
20270.610.410.81
20280.610.410.82
20290.620.420.82

Routes In New England / Mid-Atlantic Coast

Routes recording Prothonotary Warbler in New England / Mid-Atlantic Coast.
Pepperbox 2DELAWARE82024
BerlinMARYLAND72024
CokesburyMARYLAND52024
Furnace TownMARYLAND52024
PomonaNEW-JERSEY52024
PepperboxDELAWARE42016
HongaMARYLAND32024
SinepuxentMARYLAND31977
Snow HillMARYLAND31976
Cape May ChNEW-JERSEY32011
Milton 2DELAWARE22017
Piney NeckMARYLAND22017
HarmonyMARYLAND22017
DavidsnvilleMARYLAND22023
Island CreekMARYLAND22024
IndiantownMARYLAND22014
Estell ManorNEW-JERSEY22022
PedricktownNEW-JERSEY22010
SharpsVIRGINIA22022
Colonial PkyVIRGINIA21997
BrandonVIRGINIA22024
Chincoteag WVIRGINIA22015
Mt PleasantDELAWARE11968
WilmingtonDELAWARE12005
HarringtonDELAWARE12024

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