BirdAnalyst
Species · BCR 23 · BBS 2026 Release · 1966–2025

Common Raven In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionGeneralists

Common Raven in Prairie Hardwood Transition has surged: up 32× on the route-weighted index since 1969.

32×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 →
41Routes 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 Common Raven in Prairie Hardwood Transition. See the full index history below.

Common Raven In Prairie Hardwood Transition Population Forecast

If the recent trend holds, Common Raven in Prairie Hardwood Transition is projected to fall about 38% by 2030 — from 0.81 in 2025 to a central estimate of 0.50 (95% range 0.30–0.71). A 5-year backtest shows a typical error of ±37.9%, with 20% of held-out values landing inside the 95% band.

-38%Change by 2030TrendPercent 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 →
0.50Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.30–0.7195% 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 →
±37.9%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 38% by 2030 — from 0.81 in 2025 to a central estimate of 0.50 (95% range 0.30–0.71). A 5-year backtest shows a typical error of ±37.9%, with 20% of held-out values landing inside the 95% band.19662030
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 →
20260.470.270.68
20270.480.280.68
20280.490.280.69
20290.500.290.70
20300.500.300.71

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 →
ScottvilleMICHIGAN182025
MatherWISCONSIN132023
HungerfordMICHIGAN72025
LoraineWISCONSIN62025
Stevens PtWISCONSIN62022
Brook ParkMINNESOTA52025
CumberlandWISCONSIN52025
CadottWISCONSIN52025
CascoWISCONSIN52023
EvergreenMINNESOTA42025
Pigeon CreekWISCONSIN42025
Omro 2WISCONSIN42025
DresserWISCONSIN32023
WeyerhauserWISCONSIN32025
ManawaWISCONSIN32025
PrincetonWISCONSIN32024
EdwardsMINNESOTA22024
MerrillWISCONSIN22025
EsdaileWISCONSIN22025
ClintonvilleWISCONSIN22019
ColbyWISCONSIN22025
GrimmsWISCONSIN22021
BriggsvilleWISCONSIN22025
MontereyMICHIGAN12013
RemusMICHIGAN12024

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.