BirdAnalyst
Species · BCR 23 · BBS 2025 Release · 1966–2024

Caspian Tern In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionWetland birds

Caspian Tern in Prairie Hardwood Transition has edged down: down 18% on the route-weighted index since 1985.

-18%Since 1985
16Routes In Region
26Years

Notable Signals

No notable trend signals for Caspian Tern in Prairie Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, Caspian Tern in Prairie Hardwood Transition is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±62.1%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.02Projected 2029 index
0.00–0.0795% range
±62.1%Backtest error
19732029
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
20250.020.000.07
20260.020.000.07
20270.020.000.07
20280.020.000.07
20290.020.000.07

Routes In Prairie Hardwood Transition

Routes recording Caspian Tern in Prairie Hardwood Transition.
EdwardsMINNESOTA31987
GalesburgMICHIGAN21973
No BradleyMICHIGAN22012
AdrianMICHIGAN22017
Le CenterMINNESOTA22011
Indiana DuneINDIANA12024
Big Blue LkMICHIGAN12013
RemusMICHIGAN12007
HartlandMICHIGAN11993
MinnetonkaMINNESOTA11996
PrincetonMINNESOTA12001
OsseoMINNESOTA11992
KnappMINNESOTA11992
St StephenMINNESOTA11993
EvergreenMINNESOTA11990
CascoWISCONSIN12017

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