Species · Pennsylvania · BBS 2025 Release · 1966–2024

Hooded Warbler Population Trend in Pennsylvania

Hooded Warbler in Pennsylvania has surged: up 720% on the route-weighted index since 1968.

Notable Hooded Warbler Trends in PennsylvaniaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

Hooded Warbler has surged in Pennsylvania: up 720% on the route-weighted index since 1968.

Hooded Warbler Population Forecast in Pennsylvania

If the recent trend holds, Hooded Warbler in Pennsylvania is projected to rise about 15% by 2029 — from 2.8 in 2024 to a central estimate of 3.2 (95% range 2.7–3.7). A 5-year backtest shows a typical error of ±13.9%, with 60% of held-out values landing inside the 95% band.

If the recent trend holds, Hooded Warbler in Pennsylvania is projected to rise about 15% by 2029 — from 2.8 in 2024 to a central estimate of 3.2 (95% range 2.7–3.7). A 5-year backtest shows a typical error of ±13.9%, with 60% 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 →
20253.02.53.5
20263.02.53.5
20273.12.63.6
20283.12.63.6
20293.22.73.7

Hooded Warbler Survey Routes in Pennsylvania

Routes recording Hooded Warbler in Pennsylvania.
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 →
Broad Mtn.3620241993
Tussey Mtn.2720241993
Mill Run2220241978
Rothrock Sf1720191992
Roulette 21620242022
Landisburg1420241978
Odin1120241991
Roulette1120211993
Ansonia1020242002
Harrisville920231996
Duboistown820241987
N Washington720241967
N Pine Grove720241969
Eldred720221981
Laurel Hill720241978
Sigel620241981
Parkwood620241983
Kittanning620241975
Clear Spring620242002
Harmonsburg520231984
Ramsey520231995
Carsonville520231993
Normalville519701966
Whig Hill420241967
Margaret420241978

Hooded Warbler Population Trend in Other States

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