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

Grassland Birds In Delaware

All statesDelaware

6 species in this guild. As a group they are -65% since 1968.

Guild Signals

guild collapsecomputed index

Grassland birds as a group have fallen sharply in Delaware, down 65% since 1968.

Forecast

If the recent trend holds, Grassland birds in Delaware is projected to fall about 78% by 2029 — from 3.6 in 2024 to a central estimate of 0.78 (95% range 0.00–3.7). A 5-year backtest shows a typical error of ±74.4%, with 20% of held-out values landing inside the 95% band.

-78%Change by 2029
0.78Projected 2029 index
0.00–3.795% range
±74.4%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
20251.40.004.3
20261.30.004.2
20271.10.004.0
20280.940.003.8
20290.780.003.7

Member Species In Delaware

Grassland birds species in Delaware.
Northern BobwhiteOdontophoridae-95%
Eastern MeadowlarkIcteridae-94%
Vesper SparrowPasserellidae-81%
Ring-necked PheasantPhasianidae-64%
Horned LarkAlaudidae+46%
Grasshopper SparrowPasserellidae+129%

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