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Species · Maryland · BBS 2025 Release · 1966–2024

Brown Thrasher Population Trend in Maryland

All statesGeneralists

Brown Thrasher in Maryland has held roughly steady: down 9% on the route-weighted index since 1968.

-9%Since 1968
76Routes In State
58Years

Notable Brown Thrasher Trends in Maryland

No notable trend signals for Brown Thrasher in Maryland. See the full index history below.

Brown Thrasher Population Forecast in Maryland

If the recent trend holds, Brown Thrasher in Maryland is projected to fall about 31% by 2029 — from 4.4 in 2024 to a central estimate of 3.0 (95% range 0.99–5.0). A 5-year backtest shows a typical error of ±40%, with 60% of held-out values landing inside the 95% band.

-31%Change by 2029
3.0Projected 2029 index
0.99–5.095% range
±40%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
20253.11.05.1
20263.01.05.1
20273.01.05.0
20283.01.05.0
20293.00.995.0

Brown Thrasher Survey Routes in Maryland

Routes recording Brown Thrasher in Maryland.
Emmitsburg1920241966
Earlton1820242014
Pomfret1520241966
Hughesville1420241966
Finzel1020241995
Eklo920181966
Tall Timbers920141966
Grove Neck919961992
Williamsport720241966
La Plata720091966
Green Ridge720241995
Forest Grove720232011
Bald Friar719961992
Ijamsville720241986
Island Creek720241991
Smithsburg520141966
Melitota520241966
Matthews520241966
Madison520241966
St. George'S Island520172015
Walnut520241999
Madonna520222009
Davidsnville520241982
Olney420241966
Harmony420171966

Brown Thrasher Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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