BirdAnalyst
Species · Delaware · BBS 2025 Release · 1966–2024

Seaside Sparrow Population Trend in Delaware

All statesGeneralists

Seaside Sparrow in Delaware has surged: up 742% on the route-weighted index since 1969.

+742%Since 1969
10Routes In State
52Years

Notable Seaside Sparrow Trends in Delaware

long arc increasecomputed index

Seaside Sparrow has surged in Delaware: up 742% on the route-weighted index since 1969.

Seaside Sparrow Population Forecast in Delaware

If the recent trend holds, Seaside Sparrow in Delaware is projected to stay roughly flat through 2029, near 4.8 (95% range 2.4–7.3). A 5-year backtest shows a typical error of ±26.7%, with 100% of held-out values landing inside the 95% band.

+5%Change by 2029
4.8Projected 2029 index
2.4–7.395% range
±26.7%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
20254.52.17.0
20264.62.27.0
20274.72.27.1
20284.82.37.2
20294.82.47.3

Seaside Sparrow Survey Routes in Delaware

Routes recording Seaside Sparrow in Delaware.
Harrington2320241967
Dover319851966
Lowes Xrds319871967
Milton219751971
Georgetown220211992
Milton 2220172017
Bethany Bch119901966
Blackbird120231994
Pepperbox120062003
Pepperbox 2120222018

Seaside Sparrow Population Trend in Other States

alabamafloridalouisianamarylandmassachusettsnew-jerseynew-yorknorth-carolinasouth-carolinatexasvirginia

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