BirdAnalyst
Species · Maine · BBS 2025 Release · 1966–2024

Gray Catbird Population Trend in Maine

All statesGeneralists

Gray Catbird in Maine has edged down: down 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 →
72Routes 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 →
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 Gray Catbird Trends in MaineNotable 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 Maine. See the full index history below.

Gray Catbird Population Forecast in Maine

If the recent trend holds, Gray Catbird in Maine is projected to fall about 60% by 2029 — from 7.2 in 2024 to a central estimate of 2.9 (95% range 0.00–6.4). A 5-year backtest shows a typical error of ±62.2%, with 40% of held-out values landing inside the 95% band.

-60%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 →
2.9Projected 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 →
0.00–6.495% 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 →
±62.2%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 Maine is projected to fall about 60% by 2029 — from 7.2 in 2024 to a central estimate of 2.9 (95% range 0.00–6.4). A 5-year backtest shows a typical error of ±62.2%, with 40% 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 →
20253.30.006.8
20263.20.006.7
20273.10.006.6
20283.00.006.5
20292.90.006.4

Gray Catbird Survey Routes in Maine

Routes recording Gray Catbird in Maine.
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 →
Kittery Pt2620241966
Bowdoin Ctr1720211971
East Troy1720191972
Benton1519801971
Hermon1520191966
Cornville1520242012
Brooks1320191977
Hancock1220241969
Hudson1220161973
Cape Neddick1120241972
Otisfield Gr1120151966
Searsport1120242002
Westbrook920241977
Harmony920241967
Charleston920191975
Washburn920051979
Turner 2920242011
Jefferson920101991
Newcastle720241971
Warren719901973
Deblois720071966
Ludlow719981968
Boundary720161993
Church Hill720171991
Turner620101972

Gray Catbird Population Trend in Other States

alabamaarizonaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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