BirdAnalyst
Species · New York · BBS 2025 Release · 1966–2024

Pied-billed Grebe Population Trend in New York

All statesWetland birds

Pied-billed Grebe in New York has held roughly steady: down 8% on the route-weighted index since 1969.

-8%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 →
21Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
31YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Pied-billed Grebe Trends in New YorkNotable 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 Pied-billed Grebe in New York. See the full index history below.

Pied-billed Grebe Population Forecast in New York

If the recent trend holds, Pied-billed Grebe in New York is projected to stay roughly flat through 2028, near 0.02 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±44.1%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2028TrendPercent 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 →
0.02Projected 2028 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0695% 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 →
±44.1%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, Pied-billed Grebe in New York is projected to stay roughly flat through 2028, near 0.02 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±44.1%, with 100% of held-out values landing inside the 95% band.19672028
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 →
20240.020.000.06
20250.020.000.06
20260.020.000.06
20270.020.000.06
20280.020.000.06

Pied-billed Grebe Survey Routes in New York

Routes recording Pied-billed Grebe in New York.
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 →
Castile619781967
North Easton619901990
Dannemora219781977
Rhinebeck119691969
Cobleskill119711971
E Newark119671967
Phillips Cr119711971
Orleans120112011
E Youngstown119741974
Watertown119971997
Highmarket119851985
N Wilmurt119771977
Blue Ridge S119861981
Waddington119981986
Degrasse120192019
Wanakena120232008
Gabriels119891980
Sabattis119681968
Sciota119761976
Philadelphia120091999
Milford120192019

Pied-billed Grebe Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwisconsinwyoming

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