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

Common Yellowthroat Population Trend in Maryland

All statesForest birds

Common Yellowthroat in Maryland has held roughly steady: up 2% on the route-weighted index since 1968.

+2%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 →
58YearsYears 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 fall about 14% by 2029 — from 12 in 2024 to a central estimate of 10 (95% range 7.3–13). A 5-year backtest shows a typical error of ±14.6%, with 100% of held-out values landing inside the 95% band.

-14%Change by 2029TrendPercent 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 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
7.3–1395% 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 →
±14.6%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 fall about 14% by 2029 — from 12 in 2024 to a central estimate of 10 (95% range 7.3–13). A 5-year backtest shows a typical error of ±14.6%, with 100% of held-out values landing inside the 95% band.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 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 →
2025107.413
2026107.413
2027107.413
2028107.313
2029107.313

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 →
Honga5220241966
Madison4920241966
Cokesbury3920241966
Finzel3720241995
Jennings3220241995
Mt Nebo2219911969
Snow Hill2219761966
Grove Neck2219961992
Sinepuxent2119781966
Olney2020241966
Golden Hill2020241966
Accident2020171992
Earlton1720242014
Emmitsburg1620241966
Madonna1620222009
Melitota1520241966
Newark1520241966
Pt Republic1319891966
Elkton1320241966
Millington1320241966
Easton1320211966
Floyd1220241966
Largo1219811966
Piney Neck1220241966
Steyer1220241996

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 2026-05-22.