Species · Maine · BBS 2025 Release · 1966–2024
Yellow-billed Cuckoo Population Trend in Maine
Yellow-billed Cuckoo in Maine has surged: up 96% on the route-weighted index since 1978.
+96%Since 1978
18Routes In State
27Years
Notable Yellow-billed Cuckoo Trends in Maine
long arc increasecomputed index
Yellow-billed Cuckoo has surged in Maine: up 96% on the route-weighted index since 1978.
Yellow-billed Cuckoo Population Forecast in Maine
If the recent trend holds, Yellow-billed Cuckoo in Maine is projected to fall about 55% by 2027 — from 0.14 in 2022 to a central estimate of 0.06 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±47.9%, with 100% of held-out values landing inside the 95% band.
-55%Change by 2027
0.06Projected 2027 index
0.00–0.2395% range
±47.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2023 | 0.07 | 0.00 | 0.23 |
| 2024 | 0.07 | 0.00 | 0.23 |
| 2025 | 0.07 | 0.00 | 0.23 |
| 2026 | 0.07 | 0.00 | 0.23 |
| 2027 | 0.06 | 0.00 | 0.23 |
Yellow-billed Cuckoo Survey Routes in Maine
| Turner | 7 | 1997 | 1997 |
| Hartford | 3 | 2022 | 2012 |
| Eastbrook | 2 | 2019 | 1980 |
| Northfield | 2 | 1981 | 1979 |
| Cape Neddick | 1 | 1981 | 1981 |
| Westbrook | 1 | 2014 | 1977 |
| Biddeford | 1 | 1990 | 1980 |
| Kittery Pt | 1 | 1968 | 1968 |
| Greenville | 1 | 1997 | 1997 |
| Benedicta | 1 | 1979 | 1979 |
| South Arm | 1 | 2014 | 2014 |
| Bowdoin Ctr | 1 | 2011 | 1980 |
| East Troy | 1 | 2019 | 2019 |
| Rome | 1 | 1996 | 1996 |
| Searsport | 1 | 2011 | 2011 |
| Hancock | 1 | 1999 | 1980 |
| Brownfield 2 | 1 | 2015 | 2013 |
| Carrying Pl | 1 | 2003 | 2003 |
Yellow-billed Cuckoo Population Trend in Other States
alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.