BirdAnalyst
Species · BCR 28 · BBS 2025 Release · 1966–2024

Gray Catbird In Appalachian Mountains

All regionsAppalachian MountainsGeneralists

Gray Catbird in Appalachian Mountains has increased: up 46% on the route-weighted index since 1968.

+46%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 →
402Routes 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 →
58YearsYears 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 Gray Catbird in Appalachian Mountains. See the full index history below.

Gray Catbird In Appalachian Mountains Population Forecast

If the recent trend holds, Gray Catbird in Appalachian Mountains is projected to stay roughly flat through 2029, near 14 (95% range 13–16). A 5-year backtest shows a typical error of ±4.4%, with 100% of held-out values landing inside the 95% band.

-6%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 →
14Projected 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 →
13–1695% 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 →
±4.4%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, Gray Catbird in Appalachian Mountains is projected to stay roughly flat through 2029, near 14 (95% range 13–16). A 5-year backtest shows a typical error of ±4.4%, with 100% 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 →
2025141216
2026141216
2027141216
2028141316
2029141316

Routes In Appalachian Mountains

Routes recording Gray Catbird in Appalachian Mountains.
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 →
Pine Gr MillPENNSYLVANIA662024
Drehersville 2PENNSYLVANIA652024
Schaefferstown 2PENNSYLVANIA642024
Kemah LakeNEW-JERSEY632024
RamseyPENNSYLVANIA602023
WilliamsportMARYLAND592024
FinzelMARYLAND592024
WallerPENNSYLVANIA582024
RamseysburgNEW-JERSEY532024
HopeNEW-JERSEY511994
BloomsburyNEW-JERSEY512024
Wild CreekPENNSYLVANIA482024
MiddletownPENNSYLVANIA472024
JenningsMARYLAND462024
Mt HopeNEW-YORK442010
DresdenOHIO442024
DrydenNEW-YORK422024
MillvillePENNSYLVANIA422024
GeeseytownPENNSYLVANIA412024
DoverNEW-JERSEY392023
GreentownPENNSYLVANIA392024
WaterstreetPENNSYLVANIA392024
Clear SpringPENNSYLVANIA382024
N WashingtonPENNSYLVANIA362024
BetulaPENNSYLVANIA362022

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