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Species · Connecticut · BBS 2025 Release · 1966–2024

Bobolink Population Trend in Connecticut

All statesGrassland birds

Bobolink in Connecticut has fallen sharply: down 72% on the route-weighted index since 1968.

-72%Since 1968
18Routes In State
58Years

Notable Bobolink Trends in Connecticut

long arc declinecomputed index

Bobolink has fallen sharply in Connecticut: down 72% on the route-weighted index since 1968.

Bobolink Population Forecast in Connecticut

If the recent trend holds, Bobolink in Connecticut is projected to rise about 80% by 2029 — from 0.56 in 2024 to a central estimate of 1.0 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±459.6%, with 80% of held-out values landing inside the 95% band.

+80%Change by 2029
1.0Projected 2029 index
0.00–2.395% range
±459.6%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
20251.10.002.3
20261.00.002.3
20271.00.002.3
20281.00.002.3
20291.00.002.3

Bobolink Survey Routes in Connecticut

Routes recording Bobolink in Connecticut.
Woodstock 21020192019
Buckingham520141966
Sherman520191972
Uncasville320241977
Danbury319891969
Woodstock220071968
Westbrook219931972
Granby220191992
Mystic120211997
E Hartland119911966
Willimantic120011967
No Woodbury120241967
Warren120111972
Long Hill119741974
Mid Haddam120221973
Southington120071973
New Hartford119871972
Warren 2120242012

Bobolink Population Trend in Other States

californiacoloradoidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotautahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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