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

Brown-headed Cowbird In Shortgrass Prairie

All regionsShortgrass PrairieGeneralists

Brown-headed Cowbird in Shortgrass Prairie has increased: up 29% on the route-weighted index since 1969.

+29%Since 1969
136Routes In Region
57Years

Notable Signals

No notable trend signals for Brown-headed Cowbird in Shortgrass Prairie. See the full index history below.

Forecast

If the recent trend holds, Brown-headed Cowbird in Shortgrass Prairie is projected to stay roughly flat through 2029, near 5.1 (95% range 3.5–6.6). A 5-year backtest shows a typical error of ±11.5%, with 100% of held-out values landing inside the 95% band.

+3%Change by 2029
5.1Projected 2029 index
3.5–6.695% range
±11.5%Backtest error
19672029
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
20254.93.36.5
20264.93.46.5
20275.03.46.6
20285.03.46.6
20295.13.56.6

Routes In Shortgrass Prairie

Routes recording Brown-headed Cowbird in Shortgrass Prairie.
CactusTEXAS512024
Hay SpringsNEBRASKA462024
PlymellKANSAS352024
YoderWYOMING332024
JulesburgCOLORADO242021
PaxtonNEBRASKA222016
DaltonNEBRASKA222024
Wildhorse LCOLORADO192024
AmherstCOLORADO182024
FloydNEW-MEXICO182019
BoyeroCOLORADO162017
ChampionNEBRASKA162018
Fort MorganCOLORADO132024
RuletonKANSAS132022
WakaTEXAS132023
KirkCOLORADO122023
PinneoCOLORADO112019
GroverCOLORADO92024
GrigstonKANSAS92024
BriggsdaleCOLORADO82024
Last ChanceCOLORADO82015
AbarrCOLORADO82024
GilpinCOLORADO82024
NinaviewCOLORADO82024
VariaderoNEW-MEXICO82022

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