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Species · Wisconsin · BBS 2025 Release · 1966–2024

Blue-gray Gnatcatcher Population Trend in Wisconsin

All statesForest birds

Blue-gray Gnatcatcher in Wisconsin has surged: up 15× on the route-weighted index since 1974.

15×Since 1974
65Routes In State
51Years

Notable Blue-gray Gnatcatcher Trends in Wisconsin

long arc increasecomputed index

Blue-gray Gnatcatcher has surged in Wisconsin: up 15× on the route-weighted index since 1974.

Blue-gray Gnatcatcher Population Forecast in Wisconsin

If the recent trend holds, Blue-gray Gnatcatcher in Wisconsin is projected to rise about 58% by 2029 — from 0.51 in 2024 to a central estimate of 0.80 (95% range 0.52–1.1). A 5-year backtest shows a typical error of ±68.1%, with 0% of held-out values landing inside the 95% band.

+58%Change by 2029
0.80Projected 2029 index
0.52–1.195% range
±68.1%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
20250.750.471.0
20260.760.481.0
20270.770.491.1
20280.790.511.1
20290.800.521.1

Blue-gray Gnatcatcher Survey Routes in Wisconsin

Routes recording Blue-gray Gnatcatcher in Wisconsin.
Highland420241998
N Freedom420241980
Hebron420241989
Mukwonago 2420242005
Hudson320161991
Gilmanton320241984
Trempealeau320101979
Cadott320241966
Gresham320242001
Clintonville320131991
Newburg Crns320221994
Pardeeville320241985
Fall River320231987
Beloit320172001
Loraine220011992
Verona220171995
Wis Rapids220112006
Manawa220241983
Oconto Falls220181974
Kendall220231970
Princeton220191992
Rolling Pr220142005
Grimms220172012
Paris220241993
Raymond220232009

Blue-gray Gnatcatcher Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawyoming

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