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

Yellow-bellied Flycatcher In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionAerial insectivores

Yellow-bellied Flycatcher in Prairie Hardwood Transition has fallen sharply: down 57% on the route-weighted index since 1974.

-57%Since 1974TrendPercent 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 →
10Routes 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 →
18YearsYears 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 Yellow-bellied Flycatcher in Prairie Hardwood Transition. See the full index history below.

Yellow-bellied Flycatcher In Prairie Hardwood Transition Population Forecast

If the recent trend holds, Yellow-bellied Flycatcher in Prairie Hardwood Transition is projected to stay roughly flat through 2021, near 0.01 (95% range 0.00–0.05). A 5-year backtest shows a typical error of ±145.3%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2021TrendPercent 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 2021 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0595% 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 →
±145.3%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, Yellow-bellied Flycatcher in Prairie Hardwood Transition is projected to stay roughly flat through 2021, near 0.01 (95% range 0.00–0.05). A 5-year backtest shows a typical error of ±145.3%, with 100% of held-out values landing inside the 95% band.19662021
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 →
20170.010.000.05
20180.010.000.05
20190.010.000.05
20200.010.000.05
20210.010.000.05

Routes In Prairie Hardwood Transition

Routes recording Yellow-bellied 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 →
MatherWISCONSIN92003
ManitowocWISCONSIN22005
DresserWISCONSIN11966
LoraineWISCONSIN12013
CumberlandWISCONSIN12001
WeyerhauserWISCONSIN12016
ManawaWISCONSIN11988
Oconto FallsWISCONSIN12013
CascoWISCONSIN12001
StetsonvilleWISCONSIN12014

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