BirdAnalyst
Species · BCR 23 · BBS 2025 Release · 1966–2024

Olive-sided Flycatcher In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionAerial insectivores

Olive-sided Flycatcher in Prairie Hardwood Transition has declined: down 29% on the route-weighted index since 1970.

-29%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 →
20Routes 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 →
26YearsYears 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 Prairie Hardwood Transition. See the full index history below.

Olive-sided Flycatcher In Prairie Hardwood Transition Population Forecast

If the recent trend holds, Olive-sided Flycatcher in Prairie Hardwood Transition is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±53%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.01Projected 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 →
0.00–0.0395% 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 →
±53%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 Prairie Hardwood Transition is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±53%, with 100% of held-out values landing inside the 95% band.19662029
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 →
20250.010.000.03
20260.010.000.03
20270.010.000.03
20280.010.000.03
20290.010.000.03

Routes In Prairie Hardwood Transition

Routes recording Olive-sided Flycatcher in Prairie Hardwood Transition.
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 →
StetsonvilleWISCONSIN21997
PrincetonMINNESOTA12015
KnappMINNESOTA12011
EdwardsMINNESOTA11994
Sherburne NrMINNESOTA12011
HudsonWISCONSIN11970
DresserWISCONSIN11968
LoraineWISCONSIN12009
CumberlandWISCONSIN12005
WeyerhauserWISCONSIN11966
UnityWISCONSIN11992
StratfordWISCONSIN11980
ManawaWISCONSIN12010
Oconto FallsWISCONSIN11994
OmroWISCONSIN11975
ClintonvilleWISCONSIN12019
CascoWISCONSIN12009
N FreedomWISCONSIN11971
GreshamWISCONSIN12024
HollandWISCONSIN12005

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