BirdAnalyst
Species · South Carolina · BBS 2025 Release · 1966–2024

Common Grackle Population Trend in South Carolina

All statesGeneralists

Common Grackle in South Carolina has collapsed: down 86% on the route-weighted index since 1968.

-86%Since 1968
51Routes In State
58Years

Notable Common Grackle Trends in South Carolina

long arc declinecomputed index

Common Grackle has collapsed in South Carolina: down 85% on the route-weighted index since 1968.

Common Grackle Population Forecast in South Carolina

If the recent trend holds, Common Grackle in South Carolina is projected to fall about 100% by 2029 — from 6.0 in 2024 to a central estimate of 0.00 (95% range 0.00–19). A 5-year backtest shows a typical error of ±100.5%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–1995% range
±100.5%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
20250.000.0019
20260.000.0019
20270.000.0019
20280.000.0019
20290.000.0019

Common Grackle Survey Routes in South Carolina

Routes recording Common Grackle in South Carolina.
Johns Isle25319791966
Pendleton12119761966
Boiling Spgs6619791967
Boykin Ml Pd6519681966
Landrum6319921972
Chesnee3720151992
Plum Branch2920241977
Dillon2720211970
Little Mtn2619881966
Barton Creek2420221967
Blacksburg2120131998
New Holland2020241967
Owings1820041992
Bishopville1720241970
Ridgeway1720212010
Ward1520212017
Anderson1420181977
Holly Hill1220241972
Salem Xrd1220191982
Coward920241966
Nixonville719951987
Green Sea720242010
Kingstree720102010
Mount Pisgah720191998
Rome620241967

Common Grackle Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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