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Species · Maryland · BBS 2025 Release · 1966–2024

Rose-breasted Grosbeak Population Trend in Maryland

All statesGeneralists

Rose-breasted Grosbeak in Maryland has surged: up 818% on the route-weighted index since 1969.

+818%Since 1969
21Routes In State
57Years

Notable Rose-breasted Grosbeak Trends in Maryland

long arc increasecomputed index

Rose-breasted Grosbeak has surged in Maryland: up 818% on the route-weighted index since 1969.

Rose-breasted Grosbeak Population Forecast in Maryland

If the recent trend holds, Rose-breasted Grosbeak in Maryland is projected to rise about 16% by 2029 — from 0.45 in 2024 to a central estimate of 0.53 (95% range 0.25–0.81). A 5-year backtest shows a typical error of ±34.6%, with 100% of held-out values landing inside the 95% band.

+16%Change by 2029
0.53Projected 2029 index
0.25–0.8195% range
±34.6%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
20250.500.220.78
20260.510.230.79
20270.510.230.79
20280.520.240.80
20290.530.250.81

Rose-breasted Grosbeak Survey Routes in Maryland

Routes recording Rose-breasted Grosbeak in Maryland.
Jennings720241995
Finzel720241995
Wolfsville520051988
Accident 2320242021
Smithsburg220051997
Steyer220231996
Accident220151992
Ijamsville220142014
Floyd120241966
Mt Nebo119911975
Vindex120231970
Oldtown120051983
Potomac Park120211981
Bald Friar119951995
Olney120162016
Bachman Mill120071991
Eklo119871969
Upper Xrds119731970
Van Bibber119981998
Green Ridge120241995
Piney Grove120141995

Rose-breasted Grosbeak Population Trend in Other States

arkansasconnecticutgeorgiaillinoisindianaiowakansaskentuckymainemassachusettsmichiganminnesotamissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-dakotatennesseevermontvirginiawest-virginiawisconsinwyoming

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