BirdAnalyst
Species · BCR 19 · BBS 2025 Release · 1966–2024

Forster's Tern In Central Mixed Grass Prairie

All regionsCentral Mixed Grass PrairieWetland birds

Forster's Tern in Central Mixed Grass Prairie has declined: down 46% on the route-weighted index since 1969.

-46%Since 1969
8Routes In Region
50Years

Notable Signals

No notable trend signals for Forster's Tern in Central Mixed Grass Prairie. See the full index history below.

Forecast

If the recent trend holds, Forster's Tern in Central Mixed Grass Prairie is projected to stay roughly flat through 2024, near 0.12 (95% range 0.00–0.45). A 5-year backtest shows a typical error of ±364%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2024
0.12Projected 2024 index
0.00–0.4595% range
±364%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
20200.130.000.45
20210.130.000.45
20220.120.000.45
20230.120.000.45
20240.120.000.45

Routes In Central Mixed Grass Prairie

Routes recording Forster's Tern in Central Mixed Grass Prairie.
LoganKANSAS102001
AlbertKANSAS12019
MisslerKANSAS11989
Piester LakeNEBRASKA12019
KennedyNEBRASKA12014
GordonNEBRASKA12005
Crescent LkNEBRASKA12016
BrownleeNEBRASKA12008

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