BirdAnalyst
Species · Wyoming · BBS 2025 Release · 1966–2024

Cassin's Kingbird Population Trend in Wyoming

All statesAerial insectivores

Cassin's Kingbird in Wyoming has held roughly steady: up 2% on the route-weighted index since 1980.

+2%Since 1980TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
17Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
27YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Cassin's Kingbird Trends in WyomingNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

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

Cassin's Kingbird Population Forecast in Wyoming

If the recent trend holds, Cassin's Kingbird in Wyoming is projected to fall about 40% by 2029 — from 0.10 in 2024 to a central estimate of 0.06 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±158.8%, with 100% of held-out values landing inside the 95% band.

-40%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.06Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.1795% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±158.8%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Cassin's Kingbird in Wyoming is projected to fall about 40% by 2029 — from 0.10 in 2024 to a central estimate of 0.06 (95% range 0.00–0.17). A 5-year backtest shows a typical error of ±158.8%, with 100% of held-out values landing inside the 95% band.19692029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.060.000.17
20260.060.000.17
20270.060.000.17
20280.060.000.17
20290.060.000.17

Cassin's Kingbird Survey Routes in Wyoming

Routes recording Cassin's Kingbird in Wyoming.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Meadowdale519951989
Lingle420241995
Redbird319881969
Raven220242022
Otto120172017
Kaycee120242024
Fox Park120011992
Schoonover120011999
Arvada120241998
Bill120182018
Recluse120222022
Seely119951995
Upton120212021
Cheyenne120222011
Pine Bluff120162008
Gvnt Valley120032003
Hampshire120242018

Cassin's Kingbird Population Trend in Other States

arizonacaliforniacoloradokansasmontananebraskanevadanew-mexicooklahomasouth-dakotatexasutah

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