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

Common Yellowthroat Population Trend in Maryland

All statesForest birds

Common Yellowthroat in Maryland has held roughly steady: up 4% on the route-weighted index since 1968.

+4%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 →
76Routes 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 Common Yellowthroat 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 Common Yellowthroat in Maryland. See the full index history below.

Common Yellowthroat Population Forecast in Maryland

If the recent trend holds, Common Yellowthroat in Maryland is projected to stay roughly flat through 2030, near 10 (95% range 7.4–13). A 5-year backtest shows a typical error of ±11.8%, with 100% of held-out values landing inside the 95% band.

-9%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 →
10Projected 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 →
7.4–1395% 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 →
±11.8%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, Common Yellowthroat in Maryland is projected to stay roughly flat through 2030, near 10 (95% range 7.4–13). A 5-year backtest shows a typical error of ±11.8%, 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 →
2026107.513
2027107.413
2028107.413
2029107.413
2030107.413

Common Yellowthroat Survey Routes in Maryland

Routes recording Common Yellowthroat 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 →
Honga5420251966
Madison5420251966
Cokesbury4220251966
Jennings3620251995
Finzel2720251995
Mt Nebo2219911969
Snow Hill2219761966
Grove Neck2219961992
Newark2120251966
Sinepuxent2119781966
Accident2020171992
Earlton1720242014
Madonna1620222009
Olney1520251966
Piney Neck1520251966
Emmitsburg1420251966
Melitota1420251966
Pt Republic1319891966
Golden Hill1320251966
Largo1219811966
Millington1220251966
Steyer1220241996
Bald Friar1219961992
Indiantown1220141977
Accident 21120252018

Common Yellowthroat Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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