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

Blue-winged Teal In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieWaterfowl

Blue-winged Teal in Eastern Tallgrass Prairie has fallen sharply: down 63% on the route-weighted index since 1968.

-63%Since 1968
83Routes In Region
57Years

Notable Signals

long arc declinecomputed index

Blue-winged Teal has fallen sharply in Eastern Tallgrass Prairie: down 63% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Blue-winged Teal in Eastern Tallgrass Prairie is projected to fall about 85% by 2029 — from 0.11 in 2024 to a central estimate of 0.02 (95% range 0.00–0.21). A 5-year backtest shows a typical error of ±61.1%, with 100% of held-out values landing inside the 95% band.

-85%Change by 2029
0.02Projected 2029 index
0.00–0.2195% range
±61.1%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
20250.030.000.22
20260.020.000.22
20270.020.000.22
20280.020.000.21
20290.020.000.21

Routes In Eastern Tallgrass Prairie

Routes recording Blue-winged Teal in Eastern Tallgrass Prairie.
Sioux CityIOWA132024
CubaOHIO111996
ItascaILLINOIS101973
BelleviewILLINOIS81988
MelroseILLINOIS61990
Trading PostKANSAS52014
BrookvilleINDIANA41997
GalesburgKANSAS42014
GeneseoILLINOIS31975
EssexILLINOIS31979
NewarkILLINOIS31975
New LenoxILLINOIS31981
OlneyILLINOIS32013
Cedar ValleyIOWA31973
DesmoinesIOWA31979
Rock ValleyIOWA31988
GretnaNEBRASKA32016
SheffieldILLINOIS21974
ComptonILLINOIS21972
StillwellILLINOIS21992
ChandlervillILLINOIS21995
Terre HauteILLINOIS22004
BartonvilleILLINOIS21973
PawneeILLINOIS22002
KeithsburgILLINOIS22002

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