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Species · Colorado · BBS 2025 Release · 1966–2024

Cassin's Kingbird Population Trend in Colorado

All statesAerial insectivores

Cassin's Kingbird in Colorado has held roughly steady: down 8% on the route-weighted index since 1972.

-8%Since 1972
46Routes In State
51Years

Notable Cassin's Kingbird Trends in Colorado

No notable trend signals for Cassin's Kingbird in Colorado. See the full index history below.

Cassin's Kingbird Population Forecast in Colorado

If the recent trend holds, Cassin's Kingbird in Colorado is projected to fall about 51% by 2029 — from 1.1 in 2024 to a central estimate of 0.56 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±50.7%, with 80% of held-out values landing inside the 95% band.

-51%Change by 2029
0.56Projected 2029 index
0.00–1.295% range
±50.7%Backtest error
19682029
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
20250.570.001.2
20260.560.001.2
20270.560.001.2
20280.560.001.2
20290.560.001.2

Cassin's Kingbird Survey Routes in Colorado

Routes recording Cassin's Kingbird in Colorado.
Walsenburg3920241996
Cokedale2820241995
Mica Butte1419871968
Campo1320192018
Ludlow1020161998
Mesaverde Np620242009
Animas 2620212005
Edison619991989
Gribbles Prk620241998
Animas620041996
Falfa520241977
Gilpin520241979
Villegreen420241989
Dolores319721968
Doyleville319891989
Wet Mtns.320241999
Gardner320241999
Rush220241987
Hudson220032003
Doyle Bridge 2220191998
Adams Co.220222003
Crowley220221996
Trinchera220221990
Ellicott220241999
Timpas220191995

Cassin's Kingbird Population Trend in Other States

arizonacaliforniakansasmontananebraskanevadanew-mexicooklahomasouth-dakotatexasutahwyoming

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