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

Northern Rough-winged Swallow In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastAerial insectivores

Northern Rough-winged Swallow in New England / Mid-Atlantic Coast has edged up: up 22% on the route-weighted index since 1968.

+22%Since 1968
121Routes In Region
58Years

Notable Signals

No notable trend signals for Northern Rough-winged Swallow in New England / Mid-Atlantic Coast. See the full index history below.

Forecast

If the recent trend holds, Northern Rough-winged Swallow in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2029, near 0.50 (95% range 0.08–0.93). A 5-year backtest shows a typical error of ±51%, with 100% of held-out values landing inside the 95% band.

+3%Change by 2029
0.50Projected 2029 index
0.08–0.9395% range
±51%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
20250.500.070.93
20260.500.080.93
20270.500.080.93
20280.500.080.93
20290.500.080.93

Routes In New England / Mid-Atlantic Coast

Routes recording Northern Rough-winged Swallow in New England / Mid-Atlantic Coast.
UncasvilleCONNECTICUT152024
MansfieldMASSACHUSETTS102024
ElktonMARYLAND62023
BuckinghamCONNECTICUT52022
DanburyCONNECTICUT52017
ShermanCONNECTICUT42019
Lowes XrdsDELAWARE41978
BeltsvilleMARYLAND42008
Forest GroveMARYLAND42023
E PepperellMASSACHUSETTS41992
Woodbury HgtNEW-JERSEY42021
PurdyNEW-YORK41991
QuinbyVIRGINIA41995
MysticCONNECTICUT32013
Mid HaddamCONNECTICUT32024
LargoMARYLAND31966
IndiantownMARYLAND32010
Fair HillMARYLAND31996
Ware RiverMASSACHUSETTS32005
GloucesterVIRGINIA32012
TruhartVIRGINIA32015
WestbrookCONNECTICUT22024
SouthingtonCONNECTICUT22017
Warren 2CONNECTICUT22022
Mt PleasantDELAWARE22006

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