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

Savannah Sparrow Population Trend in Connecticut

All statesGrassland birds

Savannah Sparrow in Connecticut has edged down: down 12% on the route-weighted index since 1975.

-12%Since 1975
9Routes In State
28Years

Notable Savannah Sparrow Trends in Connecticut

No notable trend signals for Savannah Sparrow in Connecticut. See the full index history below.

Savannah Sparrow Population Forecast in Connecticut

If the recent trend holds, Savannah Sparrow in Connecticut is projected to fall about 27% by 2027 — from 0.36 in 2022 to a central estimate of 0.27 (95% range 0.00–0.58). A 5-year backtest shows a typical error of ±154.4%, with 100% of held-out values landing inside the 95% band.

-27%Change by 2027
0.27Projected 2027 index
0.00–0.5895% range
±154.4%Backtest error
19672027
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
20230.260.000.58
20240.260.000.58
20250.260.000.58
20260.260.000.58
20270.270.000.58

Savannah Sparrow Survey Routes in Connecticut

Routes recording Savannah Sparrow in Connecticut.
Mystic219801980
Buckingham220222007
Uncasville220221991
Willimantic220071996
No Woodbury120111967
Sherman120161976
Warren119931993
Southington119811981
New Hartford119731973

Savannah Sparrow Population Trend in Other States

alaskaarizonacaliforniacoloradodelawareidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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