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

Great-tailed Grackle In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieGeneralists

Great-tailed Grackle in Eastern Tallgrass Prairie has declined: down 49% on the route-weighted index since 1980.

-49%Since 1980
45Routes In Region
46Years

Notable Signals

No notable trend signals for Great-tailed Grackle in Eastern Tallgrass Prairie. See the full index history below.

Forecast

If the recent trend holds, Great-tailed Grackle in Eastern Tallgrass Prairie is projected to stay roughly flat through 2029, near 0.12 (95% range 0.00–0.36). A 5-year backtest shows a typical error of ±176.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.12Projected 2029 index
0.00–0.3695% range
±176.6%Backtest error
19782029
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
20250.130.000.37
20260.130.000.37
20270.130.000.36
20280.120.000.36
20290.120.000.36

Routes In Eastern Tallgrass Prairie

Routes recording Great-tailed Grackle in Eastern Tallgrass Prairie.
WrefordKANSAS82023
GalesburgKANSAS72023
WalesIOWA52013
BarclayKANSAS52021
Le LoupKANSAS52012
MadisonMISSOURI52002
DoverKANSAS42022
Rock CreekKANSAS42002
CameronMISSOURI42007
PeoriaOKLAHOMA42015
LaplandKANSAS32016
MoreheadKANSAS32024
ReeceKANSAS32016
RockinghamMISSOURI31993
FrazierMISSOURI32018
New PointMISSOURI32019
KingsvilleMISSOURI31999
CollinsvilleOKLAHOMA32019
WainwrightOKLAHOMA32003
Terre HauteILLINOIS22012
NeolaIOWA22011
HudsonIOWA22022
Sioux CityIOWA22014
EllinorKANSAS22014
LincolnvilleKANSAS22016

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