BirdAnalyst
Species · BCR 18 · BBS 2025 Release · 1966–2024

American Wigeon In Shortgrass Prairie

All regionsShortgrass PrairieWaterfowl

American Wigeon in Shortgrass Prairie has fallen sharply: down 50% on the route-weighted index since 1986.

-50%Since 1986
18Routes In Region
19Years

Notable Signals

No notable trend signals for American Wigeon in Shortgrass Prairie. See the full index history below.

Forecast

If the recent trend holds, American Wigeon in Shortgrass Prairie is projected to stay roughly flat through 2028, near 0.03 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±121.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2028
0.03Projected 2028 index
0.00–0.1195% range
±121.7%Backtest error
19732028
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
20240.040.000.11
20250.040.000.11
20260.040.000.11
20270.030.000.11
20280.030.000.11

Routes In Shortgrass Prairie

Routes recording American Wigeon in Shortgrass Prairie.
MaxwellNEW-MEXICO102006
GroverCOLORADO42008
HaswellCOLORADO41996
JulesburgCOLORADO42012
Wildhorse LCOLORADO31999
KiowaCOLORADO22012
Last ChanceCOLORADO22005
AmherstCOLORADO22009
NunnCOLORADO22017
Arsenal 2COLORADO22022
PaxtonNEBRASKA22008
ChanningTEXAS21980
PinneoCOLORADO11973
LamarCOLORADO12023
Murray LakeNEBRASKA11988
Cooley LakeNEW-MEXICO12023
WakaTEXAS11980
YoderWYOMING11986

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