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

Tricolored Heron Population Trend in South Carolina

All statesWetland birds

Tricolored Heron in South Carolina has fallen sharply: down 61% on the route-weighted index since 1970.

-61%Since 1970
6Routes In State
32Years

Notable Tricolored Heron Trends in South Carolina

long arc declinecomputed index

Tricolored Heron has fallen sharply in South Carolina: down 61% on the route-weighted index since 1970.

Tricolored Heron Population Forecast in South Carolina

If the recent trend holds, Tricolored Heron in South Carolina is projected to fall about 62% by 2029 — from 0.19 in 2024 to a central estimate of 0.07 (95% range 0.00–0.31). A 5-year backtest shows a typical error of ±63.8%, with 100% of held-out values landing inside the 95% band.

-62%Change by 2029
0.07Projected 2029 index
0.00–0.3195% range
±63.8%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
20250.080.000.32
20260.080.000.32
20270.080.000.31
20280.070.000.31
20290.070.000.31

Tricolored Heron Survey Routes in South Carolina

Routes recording Tricolored Heron in South Carolina.
Kiawah Island420241999
Holly Hill219801975
Walterboro219751971
Johns Isle119781966
Hardeeville119731968
Dale120232005

Tricolored Heron Population Trend in Other States

alabamaarkansasdelawarefloridageorgiakansaslouisianamarylandmississippinew-jerseynorth-carolinatexasvirginia

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