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

Boat-tailed Grackle Population Trend in Maryland

All statesGeneralists

Boat-tailed Grackle in Maryland has fallen sharply: down 65% on the route-weighted index since 1969.

-65%Since 1969
4Routes In State
48Years

Notable Boat-tailed Grackle Trends in Maryland

long arc declinecomputed index

Boat-tailed Grackle has fallen sharply in Maryland: down 65% on the route-weighted index since 1969.

Boat-tailed Grackle Population Forecast in Maryland

If the recent trend holds, Boat-tailed Grackle in Maryland is projected to stay roughly flat through 2024, near 0.07 (95% range 0.00–0.29). A 5-year backtest shows a typical error of ±244.4%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2024
0.07Projected 2024 index
0.00–0.2995% range
±244.4%Backtest error
19672024
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
20200.070.000.30
20210.070.000.30
20220.070.000.29
20230.070.000.29
20240.070.000.29

Boat-tailed Grackle Survey Routes in Maryland

Routes recording Boat-tailed Grackle in Maryland.
Golden Hill2920082002
Honga220181973
Madison120191967
Sinepuxent119751975

Boat-tailed Grackle Population Trend in Other States

alabamadelawarefloridageorgialouisianamississippinew-jerseynew-yorknorth-carolinasouth-carolinatexasvirginia

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