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Species · Connecticut · BBS 2025 Release · 1966–2024

Eastern Bluebird Population Trend in Connecticut

All statesForest birds

Eastern Bluebird in Connecticut has surged: up 283% on the route-weighted index since 1968.

+283%Since 1968
20Routes In State
58Years

Notable Eastern Bluebird Trends in Connecticut

long arc increasecomputed index

Eastern Bluebird has surged in Connecticut: up 283% on the route-weighted index since 1968.

Eastern Bluebird Population Forecast in Connecticut

If the recent trend holds, Eastern Bluebird in Connecticut is projected to fall about 23% by 2029 — from 5.1 in 2024 to a central estimate of 3.9 (95% range 2.4–5.4). A 5-year backtest shows a typical error of ±36.6%, with 40% of held-out values landing inside the 95% band.

-23%Change by 2029
3.9Projected 2029 index
2.4–5.495% range
±36.6%Backtest error
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 index95% low95% high
20253.72.25.2
20263.82.35.3
20273.82.35.3
20283.92.45.4
20293.92.45.4

Eastern Bluebird Survey Routes in Connecticut

Routes recording Eastern Bluebird in Connecticut.
Southington1720241978
Buckingham820221971
Sherman820191973
Mid Haddam720241973
Mystic620231973
Westbrook620241969
Greenwich620181967
Willimantic520181967
Woodstock 2520242016
Granby420241989
Uncasville320241973
Woodstock220071974
No Woodbury220241967
Danbury220231972
E Hartland119901966
Warren120111976
Long Hill120191973
New Hartford119871972
New Hartford120242010
Warren 2120242012

Eastern Bluebird Population Trend in Other States

alabamaarizonaarkansascoloradodelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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