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

Belted Kingfisher Population Trend in Connecticut

All statesGeneralists

Belted Kingfisher in Connecticut has fallen sharply: down 53% on the route-weighted index since 1969.

-53%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 →
19Routes 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 ConnecticutNotable 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 Connecticut: down 53% on the route-weighted index since 1969.

Belted Kingfisher Population Forecast in Connecticut

If the recent trend holds, Belted Kingfisher in Connecticut is projected to rise about 106% by 2029 — from 0.11 in 2024 to a central estimate of 0.23 (95% range 0.00–0.53). A 5-year backtest shows a typical error of ±100.2%, with 100% of held-out values landing inside the 95% band.

+106%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 →
0.23Projected 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 →
0.00–0.5395% 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 →
±100.2%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, Belted Kingfisher in Connecticut is projected to rise about 106% by 2029 — from 0.11 in 2024 to a central estimate of 0.23 (95% range 0.00–0.53). A 5-year backtest shows a typical error of ±100.2%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20250.240.000.54
20260.240.000.53
20270.230.000.53
20280.230.000.53
20290.230.000.53

Belted Kingfisher Survey Routes in Connecticut

Routes recording Belted Kingfisher in Connecticut.
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 →
New Hartford220101995
Mystic119991974
E Hartland119871967
Buckingham120051980
Uncasville120131980
Westbrook120061981
Willimantic120151969
No Woodbury120221972
Sherman120171975
Greenwich119921975
Danbury120071968
Warren120101974
Long Hill120181972
Mid Haddam120231974
Southington120221987
New Hartford119871972
Woodstock 2120242024
Warren 2120212013
Granby120181988

Belted Kingfisher Population Trend in Other States

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

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