Species · BCR 13 · BBS 2025 Release · 1966–2024

Black-billed Cuckoo In Lower Great Lakes / St. Lawrence Plain

All regions Lower Great Lakes / St. Lawrence Plain Generalists

Black-billed Cuckoo in Lower Great Lakes / St. Lawrence Plain has collapsed: down 80% on the route-weighted index since 1968.

-80%Since 1968

82Routes In Region

58Years

Notable Signals

long arc declinecomputed index

Black-billed Cuckoo has collapsed in Lower Great Lakes / St. Lawrence Plain: down 80% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Black-billed Cuckoo in Lower Great Lakes / St. Lawrence Plain is projected to rise about 247% by 2029 — from 0.06 in 2024 to a central estimate of 0.21 (95% range 0.00–0.70). A 5-year backtest shows a typical error of ±108.5%, with 100% of held-out values landing inside the 95% band.

+247%Change by 2029

0.21Projected 2029 index

0.00–0.7095% range

±108.5%Backtest error

Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.

Year	Projected index	95% high
2025	0.25	0.74
2026	0.24	0.73
2027	0.23	0.72
2028	0.23	0.71
2029	0.21	0.70

Routes In Lower Great Lakes / St. Lawrence Plain

Routes recording Black-billed Cuckoo in Lower Great Lakes / St. Lawrence Plain.

Canadice L	NEW-YORK	5	2019
Rushville	NEW-YORK	4	2022
Duanesburg	NEW-YORK	3	2022
Branchport	NEW-YORK	3	2022
Mendon	NEW-YORK	3	2017
Rhinebeck	NEW-YORK	2	2015
Highland	NEW-YORK	2	2013
Catskills	NEW-YORK	2	2009
Ghent	NEW-YORK	2	2005
Ballston Lk	NEW-YORK	2	1994
Mt Morris	NEW-YORK	2	2016
Castile	NEW-YORK	2	2019
Randolph	NEW-YORK	2	2014
Sheridan	NEW-YORK	2	1994
E Youngstown	NEW-YORK	2	2008
Cicero Ctr	NEW-YORK	2	2022
Clinton	NEW-YORK	2	2013
Argyle	NEW-YORK	2	2010
Balmat	NEW-YORK	2	2008
Harris Hill	NEW-YORK	2	2018
Middlefield	OHIO	2	1995
Hiram	OHIO	2	2000
Akeley	PENNSYLVANIA	2	1979
Harrisville	PENNSYLVANIA	2	2005
W Shokan	NEW-YORK	1	2013

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