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

Olive-sided Flycatcher In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauAerial insectivores

Olive-sided Flycatcher in Southern Rockies / Colorado Plateau has edged down: down 14% on the route-weighted index since 1970.

-14%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 →
131Routes 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 Olive-sided Flycatcher in Southern Rockies / Colorado Plateau. See the full index history below.

Olive-sided Flycatcher In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Olive-sided Flycatcher in Southern Rockies / Colorado Plateau is projected to rise about 30% by 2029 — from 0.54 in 2024 to a central estimate of 0.69 (95% range 0.21–1.2). A 5-year backtest shows a typical error of ±52.2%, with 100% of held-out values landing inside the 95% band.

+30%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 →
0.69Projected 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 →
0.21–1.295% 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 →
±52.2%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, Olive-sided Flycatcher in Southern Rockies / Colorado Plateau is projected to rise about 30% by 2029 — from 0.54 in 2024 to a central estimate of 0.69 (95% range 0.21–1.2). A 5-year backtest shows a typical error of ±52.2%, 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 →
20250.680.201.2
20260.690.211.2
20270.690.211.2
20280.690.211.2
20290.690.211.2

Routes In Southern Rockies / Colorado Plateau

Routes recording Olive-sided Flycatcher 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 →
SawmillARIZONA141992
Buffalo ParkCOLORADO102023
DoloresCOLORADO91969
Stillwater PassCOLORADO72009
Stillwater Pass 2COLORADO72024
Cheesman LkCOLORADO62024
Red CliffCOLORADO62023
ClevelandUTAH61992
Dixie NfUTAH62024
Comanche PkCOLORADO52024
Ragged Mtn.COLORADO52019
Lost LakeCOLORADO42024
Blackhead PkCOLORADO42014
Deadman Rd.COLORADO42023
Lake City 2COLORADO42022
Dolores RivCOLORADO32024
TincupCOLORADO32024
PowderhornCOLORADO32023
South ForkCOLORADO32024
RadiumCOLORADO32012
Cochetopa PassCOLORADO32024
HeeneyCOLORADO32019
Gold Hill 2COLORADO32023
Angel Fire 2NEW-MEXICO32024
Navajo LakeUTAH32024

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