BirdAnalyst
Species · BCR 29 · BBS 2026 Release · 1966–2025

Gray Catbird In Piedmont

All regionsPiedmontForest birds

Gray Catbird in Piedmont has held roughly steady: up 7% on the route-weighted index since 1968.

+7%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 →
166Routes 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 →

No notable trend signals for Gray Catbird in Piedmont. See the full index history below.

Gray Catbird In Piedmont Population Forecast

If the recent trend holds, Gray Catbird in Piedmont is projected to rise about 14% by 2030 — from 11 in 2025 to a central estimate of 13 (95% range 11–16). A 5-year backtest shows a typical error of ±12.5%, with 100% of held-out values landing inside the 95% band.

+14%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 →
13Projected 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 →
11–1695% 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 →
±12.5%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 Piedmont is projected to rise about 14% by 2030 — from 11 in 2025 to a central estimate of 13 (95% range 11–16). A 5-year backtest shows a typical error of ±12.5%, with 100% 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 →
2026131015
2027131115
2028131116
2029131116
2030131116

Routes In Piedmont

Routes recording Gray Catbird in Piedmont.
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 →
EmmitsburgMARYLAND1222025
OlneyMARYLAND1162025
EarltonMARYLAND972024
CollegevillePENNSYLVANIA862024
MadonnaMARYLAND722022
Doe RunPENNSYLVANIA652025
Croton 2NEW-JERSEY612025
West GrovePENNSYLVANIA601996
EkloMARYLAND572018
ChathamPENNSYLVANIA562025
Bachman MillMARYLAND552025
WheatonMARYLAND552025
Pleasant ValMARYLAND512025
JacobusPENNSYLVANIA492025
GilletteNEW-JERSEY482025
TaylorstownVIRGINIA462010
CrotonNEW-JERSEY452007
WarfieldsbrgMARYLAND402025
IjamsvilleMARYLAND402025
RandallstownMARYLAND382013
Mt Gretna 2PENNSYLVANIA362022
SandbrookNEW-JERSEY352025
Mount JoyPENNSYLVANIA332025
SchwenksvillPENNSYLVANIA332024
Brick TavernPENNSYLVANIA322025

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