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

Belted Kingfisher Population Trend in Maine

All statesGeneralists

Belted Kingfisher in Maine has fallen sharply: down 50% on the route-weighted index since 1968.

-50%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 →
71Routes 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 →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Belted Kingfisher 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 →

Belted Kingfisher has fallen sharply in Maine: down 50% on the route-weighted index since 1968.

Belted Kingfisher Population Forecast in Maine

If the recent trend holds, Belted Kingfisher in Maine is projected to rise about 98% by 2027 — from 0.10 in 2022 to a central estimate of 0.19 (95% range 0.00–0.45). A 5-year backtest shows a typical error of ±72.4%, with 100% of held-out values landing inside the 95% band.

+98%Change by 2027TrendPercent 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 →
0.19Projected 2027 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.4595% 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 →
±72.4%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, Belted Kingfisher in Maine is projected to rise about 98% by 2027 — from 0.10 in 2022 to a central estimate of 0.19 (95% range 0.00–0.45). A 5-year backtest shows a typical error of ±72.4%, with 100% of held-out values landing inside the 95% band.19662027
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 →
20230.210.000.47
20240.200.000.47
20250.200.000.46
20260.190.000.46
20270.190.000.45

Belted Kingfisher Survey Routes in Maine

Routes recording Belted Kingfisher 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 →
Castine419861976
Moose River420051985
Wytopitlock319971978
Hudson320161976
Clayton Lake320011977
Clayton Lake 2320112011
Cape Neddick220051972
South Arm219971977
Freedom220072007
Northfield219801980
Charleston220171977
Greenville220191976
Priestly Br.220111994
Baker Lake220012001
Brownfield 2220182011
Heron Lake219931985
Andover220102010
Lake Moxie220212006
Westbrook120131984
Biddeford120071981
Kittery Pt120221966
Newcastle120081971
Wilson Mills120191983
Bethel120171977
Turner119961972

Belted Kingfisher Population Trend in Other States

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

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