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Species · Maine · BBS 2025 Release · 1966–2024

Eastern Kingbird Population Trend in Maine

All statesAerial insectivores

Eastern Kingbird in Maine has collapsed: down 77% on the route-weighted index since 1968.

-77%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 →
68Routes 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 Eastern Kingbird 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 →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Eastern Kingbird has collapsed in Maine: down 77% on the route-weighted index since 1968.

Eastern Kingbird Population Forecast in Maine

If the recent trend holds, Eastern Kingbird in Maine is projected to fall about 97% by 2029 — from 0.79 in 2024 to a central estimate of 0.02 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±51.8%, with 100% of held-out values landing inside the 95% band.

-97%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 →
0.02Projected 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 →
0.00–2.395% 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 →
±51.8%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, Eastern Kingbird in Maine is projected to fall about 97% by 2029 — from 0.79 in 2024 to a central estimate of 0.02 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±51.8%, 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 →
20250.310.002.6
20260.230.002.5
20270.160.002.5
20280.090.002.4
20290.020.002.3

Eastern Kingbird Survey Routes in Maine

Routes recording Eastern Kingbird 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 →
Benton719801971
Northfield719811977
Hudson520001973
Turner420101972
Hartford420241975
Grnd Lk Strm419931990
Cape Neddick320211973
Newcastle320231971
Warren319901973
Northfield 2320182016
Searsport320242002
Rome320221996
Biddeford220191973
Kittery Pt220231966
Wilson Mills219841984
Greenwood220231966
Bowdoin Ctr220211971
Harmony220231967
Brooks220191977
Hermon220191966
Castine220001976
Deblois219911966
Moose River220071983
Carrying Pl220241979
Cambridge220121968

Eastern Kingbird Population Trend in Other States

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

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