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Species · Maryland · BBS 2025 Release · 1966–2024

Acadian Flycatcher Population Trend in Maryland

All statesAerial insectivores

Acadian Flycatcher in Maryland has surged: up 181% on the route-weighted index since 1968.

+181%Since 1968
76Routes In State
58Years

Notable Acadian Flycatcher Trends in Maryland

long arc increasecomputed index

Acadian Flycatcher has surged in Maryland: up 181% on the route-weighted index since 1968.

Acadian Flycatcher Population Forecast in Maryland

If the recent trend holds, Acadian Flycatcher in Maryland is projected to fall about 15% by 2029 — from 9.8 in 2024 to a central estimate of 8.4 (95% range 6.6–10). A 5-year backtest shows a typical error of ±16%, with 40% of held-out values landing inside the 95% band.

-15%Change by 2029
8.4Projected 2029 index
6.6–1095% range
±16%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
20258.06.29.8
20268.16.39.9
20278.26.49.9
20288.36.510
20298.46.610

Acadian Flycatcher Survey Routes in Maryland

Routes recording Acadian Flycatcher in Maryland.
Island Creek6720241991
Pomonkey5520241966
Earlton4820242014
Hughesville2420241966
Smithsburg1920141972
Davidsnville1920241982
La Plata1720091966
Pomfret1520241966
Millington1520241969
Wolfsville1420241966
Olney1420241966
Forest Grove1420232011
Pr Frederick1320241991
Pt Republic1219891966
Oldtown1120241970
Furnace Town1120242015
Tall Timbers1020141966
Madonna1020222009
Nottingham1020242005
St. George'S Island920172015
Jennings820241995
Cheltenham720041966
Broomes Isl719961966
Sinepuxent719781966
Green Ridge720241995

Acadian Flycatcher Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvirginiawest-virginiawisconsin

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