BirdAnalyst
Species · BCR 27 · BBS 2025 Release · 1966–2024

Caspian Tern In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainWetland birds

Caspian Tern in Southeastern Coastal Plain has declined: down 31% on the route-weighted index since 1970.

-31%Since 1970
12Routes In Region
40Years

Notable Signals

No notable trend signals for Caspian Tern in Southeastern Coastal Plain. See the full index history below.

Forecast

If the recent trend holds, Caspian Tern in Southeastern Coastal Plain is projected to stay roughly flat through 2024, near 0.03 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±19.1%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2024
0.03Projected 2024 index
0.00–0.0895% range
±19.1%Backtest error
19662024
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
20200.030.000.08
20210.030.000.08
20220.030.000.08
20230.030.000.08
20240.030.000.08

Routes In Southeastern Coastal Plain

Routes recording Caspian Tern in Southeastern Coastal Plain.
Dauphin Is 2ALABAMA32019
Alabama PtALABAMA22000
Ft Waltn BchFLORIDA22002
St Vincent IFLORIDA22019
Johns IsleSOUTH-CAROLINA21968
Dauphin IsALABAMA11990
St. ElmoALABAMA12007
Port St JoeFLORIDA12008
Ft GadsdenFLORIDA11979
Santa RosaFLORIDA11998
MerrimonNORTH-CAROLINA12002
Kiawah IslandSOUTH-CAROLINA11999

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