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Species · BCR 30 · BBS 2026 Release · 1966–2025

Yellow-billed Cuckoo In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastForest birds

Yellow-billed Cuckoo in New England / Mid-Atlantic Coast has declined: down 38% on the route-weighted index since 1968.

-38%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 →
160Routes In RegionSurvey 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 SignalsNotable 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 Yellow-billed Cuckoo in New England / Mid-Atlantic Coast. See the full index history below.

Yellow-billed Cuckoo In New England / Mid-Atlantic Coast Population Forecast

If the recent trend holds, Yellow-billed Cuckoo in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2030, near 1.6 (95% range 0.00–3.5). A 5-year backtest shows a typical error of ±18.8%, 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 →
1.6Projected 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 →
0.00–3.595% 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 →
±18.8%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, Yellow-billed Cuckoo in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2030, near 1.6 (95% range 0.00–3.5). A 5-year backtest shows a typical error of ±18.8%, 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 →
20261.70.003.6
20271.70.003.6
20281.70.003.6
20291.70.003.6
20301.60.003.5

Routes In New England / Mid-Atlantic Coast

Routes recording Yellow-billed Cuckoo in New England / Mid-Atlantic Coast.
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 →
Spraguetown 2NEW-JERSEY112007
Furnace TownMARYLAND102025
BrandonVIRGINIA102025
Lowes XrdsDELAWARE91991
Holleyville 2DELAWARE92019
Snow HillMARYLAND91976
WillimanticCONNECTICUT72018
HolleyvilleDELAWARE72004
Milton 2DELAWARE72025
WalnutMARYLAND72024
Del HavenNEW-JERSEY71991
SinepuxentMARYLAND61978
Island CreekMARYLAND62025
Casimir Pulaski SfRHODE-ISLAND62018
White StoneVIRGINIA62025
Cape CharlesVIRGINIA62018
WoodstockCONNECTICUT52007
BlackbirdDELAWARE52025
Pt RepublicMARYLAND51988
Tall TimbersMARYLAND52013
La PlataMARYLAND52009
MardelaMARYLAND52019
NewarkMARYLAND52025
St. George'S IslandMARYLAND52017
IndiantownMARYLAND52014

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