BirdAnalyst
Species · BCR 24 · BBS 2026 Release · 1966–2025

Pine Warbler In Central Hardwoods

All regionsCentral HardwoodsForest birds

Pine Warbler in Central Hardwoods has surged: up 17× on the route-weighted index since 1968.

17×Since 1968TrendPercent 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 →
101Routes 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 →
59YearsYears 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 →

Pine Warbler has surged in Central Hardwoods: up 17× on the route-weighted index since 1968.

Pine Warbler In Central Hardwoods Population Forecast

If the recent trend holds, Pine Warbler in Central Hardwoods is projected to rise about 32% by 2030 — from 2.0 in 2025 to a central estimate of 2.6 (95% range 1.8–3.4). A 5-year backtest shows a typical error of ±29%, with 80% of held-out values landing inside the 95% band.

+32%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 →
2.6Projected 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 →
1.8–3.495% 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 →
±29%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, Pine Warbler in Central Hardwoods is projected to rise about 32% by 2030 — from 2.0 in 2025 to a central estimate of 2.6 (95% range 1.8–3.4). A 5-year backtest shows a typical error of ±29%, with 80% 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 →
20262.51.63.3
20272.51.73.3
20282.51.73.4
20292.61.73.4
20302.61.83.4

Routes In Central Hardwoods

Routes recording Pine Warbler in Central Hardwoods.
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 →
BennettMISSOURI262025
CentervilleMISSOURI212025
LurtonARKANSAS192023
Ozark NfARKANSAS152025
CascadeMISSOURI142025
AkersMISSOURI122025
MincyMISSOURI122025
MarshallARKANSAS112021
WilliamsvillMISSOURI112025
TrianaALABAMA102012
Boston Mtn.ARKANSAS102025
HoosierINDIANA102025
Trace CollinwoodTENNESSEE92018
Valhermoso SpgsALABAMA82010
HillsboroALABAMA71996
RupertARKANSAS72024
Valhermoso Spg 2ALABAMA62014
SyracuseMISSOURI62016
CollinwoodTENNESSEE62025
DelwoodILLINOIS52025
ApexKENTUCKY52025
RueterMISSOURI52022
CourtlandALABAMA42023
HildaMISSOURI42025
PalaceMISSOURI42025

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