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

Black-billed Cuckoo In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieGeneralists

Black-billed Cuckoo in Eastern Tallgrass Prairie has collapsed: down 89% on the route-weighted index since 1968.

-89%Since 1968
188Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Black-billed Cuckoo has collapsed in Eastern Tallgrass Prairie: down 89% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Black-billed Cuckoo in Eastern Tallgrass Prairie is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.20). A 5-year backtest shows a typical error of ±142.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.00Projected 2029 index
0.00–0.2095% range
±142.6%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
20250.000.000.20
20260.000.000.20
20270.000.000.20
20280.000.000.20
20290.000.000.20

Routes In Eastern Tallgrass Prairie

Routes recording Black-billed Cuckoo in Eastern Tallgrass Prairie.
McfallMISSOURI42024
HolcombILLINOIS32008
GeneseoILLINOIS32013
ComptonILLINOIS31973
WalesIOWA32018
WashtaIOWA32003
AustinMINNESOTA32018
HuntsvilleMISSOURI32011
ElmoMISSOURI32023
Mill CreekILLINOIS22007
PutnamILLINOIS21990
ChandlervillILLINOIS21973
Deer CreekILLINOIS21997
MilfordILLINOIS22007
ConcordILLINOIS22011
RosamondILLINOIS21978
CaledoniaILLINOIS22016
SenecaILLINOIS22021
Grape CreekILLINOIS22019
GalvestonINDIANA22007
SwayzeeINDIANA21981
MilroyINDIANA21980
BrookvilleINDIANA21995
WallaceINDIANA22002
MelroseIOWA22010

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