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

Northern Parula Population Trend in Maryland

All statesForest birds

Northern Parula in Maryland has surged: up 172% on the route-weighted index since 1968.

+172%Since 1968
72Routes In State
58Years

Notable Northern Parula Trends in Maryland

long arc increasecomputed index

Northern Parula has surged in Maryland: up 172% on the route-weighted index since 1968.

Northern Parula Population Forecast in Maryland

If the recent trend holds, Northern Parula in Maryland is projected to stay roughly flat through 2029, near 3.5 (95% range 3.0–4.1). A 5-year backtest shows a typical error of ±8.1%, with 100% of held-out values landing inside the 95% band.

+7%Change by 2029
3.5Projected 2029 index
3.0–4.195% range
±8.1%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
20253.32.83.9
20263.42.83.9
20273.42.94.0
20283.52.94.0
20293.53.04.1

Northern Parula Survey Routes in Maryland

Routes recording Northern Parula in Maryland.
Pomonkey3520241966
Island Creek1820241991
Hughesville1320241966
Pomfret1120241966
Jennings1120241995
Pt Republic1019891966
Earlton1020242014
Broomes Isl819961966
Forest Grove720232011
Davidsnville720241982
Nottingham720242005
La Plata520091966
Olney420241966
Tall Timbers420141966
Furnace Town420232015
Wheaton420241990
Williamsport320242001
Van Bibber320131966
Piney Grove320231995
Accident320171992
Silver Spg219861967
Norwood220111973
Largo219801966
Theodore220131968
Cokesbury220212008

Northern Parula Population Trend in Other States

alabamaarkansascaliforniaconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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