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

Tree Swallow In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastAerial insectivores

Tree Swallow in New England / Mid-Atlantic Coast has edged up: up 17% on the route-weighted index since 1968.

+17%Since 1968
153Routes In Region
58Years

Notable Signals

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

Forecast

If the recent trend holds, Tree Swallow in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2029, near 4.3 (95% range 2.9–5.6). A 5-year backtest shows a typical error of ±10.9%, with 100% of held-out values landing inside the 95% band.

+7%Change by 2029
4.3Projected 2029 index
2.9–5.695% range
±10.9%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
20254.22.85.5
20264.22.95.6
20274.22.95.6
20284.32.95.6
20294.32.95.6

Routes In New England / Mid-Atlantic Coast

Routes recording Tree Swallow in New England / Mid-Atlantic Coast.
MadisonMARYLAND292024
HongaMARYLAND252024
BrandonVIRGINIA252024
WilmingtonDELAWARE182014
GeorgetownDELAWARE182022
N. AndoverMASSACHUSETTS172024
WarrenCONNECTICUT132011
JessupMARYLAND132024
Cape CharlesVIRGINIA132018
MansfieldMASSACHUSETTS122024
MarionMASSACHUSETTS112024
BrentwoodNEW-HAMPSHIRE111997
Jones BeachNEW-YORK112013
FredericaDELAWARE102014
BrocktonMASSACHUSETTS102019
BelchertownMASSACHUSETTS102024
ShermanCONNECTICUT92019
Warren 2MASSACHUSETTS92024
Mid HaddamCONNECTICUT82024
HarringtonDELAWARE82024
S BarreMASSACHUSETTS82024
Gay HeadMASSACHUSETTS82023
WinslowNEW-JERSEY82024
WoodstockCONNECTICUT72007
WestbrookCONNECTICUT72024

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