BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

White-throated Swift In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauAerial insectivores

White-throated Swift in Southern Rockies / Colorado Plateau has edged down: down 16% on the route-weighted index since 1970.

-16%Since 1970TrendPercent 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 →
144Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 White-throated Swift in Southern Rockies / Colorado Plateau. See the full index history below.

White-throated Swift In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, White-throated Swift in Southern Rockies / Colorado Plateau is projected to rise about 153% by 2029 — from 0.70 in 2024 to a central estimate of 1.8 (95% range 0.00–3.9). A 5-year backtest shows a typical error of ±164.8%, with 100% of held-out values landing inside the 95% band.

+153%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 →
1.8Projected 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 →
0.00–3.995% 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 →
±164.8%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, White-throated Swift in Southern Rockies / Colorado Plateau is projected to rise about 153% by 2029 — from 0.70 in 2024 to a central estimate of 1.8 (95% range 0.00–3.9). A 5-year backtest shows a typical error of ±164.8%, with 100% of held-out values landing inside the 95% band.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 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 →
20251.80.003.9
20261.80.003.9
20271.80.003.9
20281.80.003.9
20291.80.003.9

Routes In Southern Rockies / Colorado Plateau

Routes recording White-throated Swift in Southern Rockies / Colorado Plateau.
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 →
Arches NpUTAH962011
La SalUTAH361999
WellingtonUTAH322002
CastletonUTAH291985
RosevaleCOLORADO182024
ShivwitzUTAH172024
Gilson ButteUTAH122004
ClevelandUTAH112024
CanyonlandsUTAH112006
Many FarmsARIZONA102005
CastletonCOLORADO101991
Rifle FallsCOLORADO102021
BoulderUTAH102018
CanyonlandsUTAH102022
Round RockARIZONA91976
GreasewoodARIZONA81993
HiteUTAH72021
YampaiARIZONA61971
Douglas PassCOLORADO62024
UncompahgreCOLORADO62019
CortezCOLORADO62006
Piceance BasinCOLORADO62003
HanksvilleUTAH62010
KamasUTAH62018
Dolores RivCOLORADO51995

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