BirdAnalyst
Species · Maryland · BBS 2026 Release · 1966–2025

Baltimore Oriole Population Trend in Maryland

All statesForest birds

Baltimore Oriole in Maryland has held roughly steady: up 3% on the route-weighted index since 1968.

+3%Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
73Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Baltimore Oriole Trends in MarylandNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Baltimore Oriole in Maryland. See the full index history below.

Baltimore Oriole Population Forecast in Maryland

If the recent trend holds, Baltimore Oriole in Maryland is projected to stay roughly flat through 2030, near 1.9 (95% range 1.0–2.7). A 5-year backtest shows a typical error of ±7.8%, with 100% of held-out values landing inside the 95% band.

+2%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
1.9Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
1.0–2.795% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±7.8%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Baltimore Oriole in Maryland is projected to stay roughly flat through 2030, near 1.9 (95% range 1.0–2.7). A 5-year backtest shows a typical error of ±7.8%, with 100% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20261.91.02.8
20271.91.02.8
20281.91.02.8
20291.91.02.7
20301.91.02.7

Baltimore Oriole Survey Routes in Maryland

Routes recording Baltimore Oriole in Maryland.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Williamsport1820251966
Olney1020251966
Bald Friar719961992
Floyd520251966
Pleasant Val520251966
Ijamsville520251986
Indiantown519861986
Silver Spg419891966
Eklo420181967
Van Bibber420131966
Largo419811967
Earlton420242014
Madonna420222009
Vindex320231966
Potomac Park320251970
Emmitsburg320251966
Norwood320101966
Bachman Mill320251967
Cheltenham319971978
La Plata320091981
Melitota320251966
Grove Neck319961992
Snow Hill319731973
Wolfsville220241966
Walnut220042004

Baltimore Oriole Population Trend in Other States

alabamaarkansascaliforniacoloradoconnecticutdelawaregeorgiaillinoisindianaiowakansaskentuckylouisianamainemassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.