BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Bobolink In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieGrassland birds

Bobolink in Eastern Tallgrass Prairie has collapsed: down 91% on the route-weighted index since 1968.

-91%Since 1968
195Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Bobolink has collapsed in Eastern Tallgrass Prairie: down 91% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Bobolink in Eastern Tallgrass Prairie is projected to fall about 100% by 2029 — from 0.57 in 2024 to a central estimate of 0.00 (95% range 0.00–2.0). A 5-year backtest shows a typical error of ±103.9%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–2.095% range
±103.9%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
20250.000.002.0
20260.000.002.0
20270.000.002.0
20280.000.002.0
20290.000.002.0

Routes In Eastern Tallgrass Prairie

Routes recording Bobolink in Eastern Tallgrass Prairie.
LucerneMISSOURI452021
GreenviewILLINOIS292005
BedfordIOWA172018
Concord WestILLINOIS122007
WashtaIOWA122014
Ash CreekMINNESOTA122024
NewportOHIO121994
McfallMISSOURI102024
SticklervillMISSOURI92024
XeniaOHIO92016
MonicaILLINOIS72017
Davis CornerIOWA72024
FriendswoodINDIANA62000
HudsonIOWA62022
FrazierMISSOURI62017
TrentonMISSOURI62024
Kahoka2MISSOURI62022
KunkleOHIO62023
MarionOHIO61983
WilliamsfldILLINOIS52014
BrooklynIOWA52021
WalesIOWA52018
New HamptonMISSOURI52024
SherburnvillILLINOIS42012
SwayzeeINDIANA42003

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