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

Common Raven In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionGeneralists

Common Raven in Prairie Hardwood Transition has surged: up 24× on the route-weighted index since 1969.

24×Since 1969TrendPercent 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 →
38Routes 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 →
55YearsYears 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Common Raven has surged in Prairie Hardwood Transition: up 24× on the route-weighted index since 1969.

Common Raven In Prairie Hardwood Transition Population Forecast

If the recent trend holds, Common Raven in Prairie Hardwood Transition is projected to fall about 16% by 2029 — from 0.56 in 2024 to a central estimate of 0.47 (95% range 0.29–0.65). A 5-year backtest shows a typical error of ±35.2%, with 40% of held-out values landing inside the 95% band.

-16%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 →
0.47Projected 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 →
0.29–0.6595% 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 →
±35.2%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, Common Raven in Prairie Hardwood Transition is projected to fall about 16% by 2029 — from 0.56 in 2024 to a central estimate of 0.47 (95% range 0.29–0.65). A 5-year backtest shows a typical error of ±35.2%, with 40% 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 →
20250.440.260.62
20260.450.270.63
20270.450.270.63
20280.460.280.64
20290.470.290.65

Routes In Prairie Hardwood Transition

Routes recording Common Raven 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 →
MatherWISCONSIN132023
GreshamWISCONSIN102024
CumberlandWISCONSIN72024
CadottWISCONSIN62024
Stevens PtWISCONSIN62022
EvergreenMINNESOTA52024
WeyerhauserWISCONSIN52024
CascoWISCONSIN52023
StetsonvilleWISCONSIN52024
SaxevilleWISCONSIN42022
Brook ParkMINNESOTA32021
DresserWISCONSIN32023
MerrillWISCONSIN32024
PrincetonWISCONSIN32024
ScottvilleMICHIGAN22024
HungerfordMICHIGAN22024
EdwardsMINNESOTA22024
ClintonvilleWISCONSIN22019
ColbyWISCONSIN22017
GrimmsWISCONSIN22021
MontereyMICHIGAN12013
RemusMICHIGAN12024
Chippewa Lk.MICHIGAN12024
PrincetonMINNESOTA12019
HudsonWISCONSIN11982

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