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Species · Maine · BBS 2025 Release · 1966–2024

American Black Duck Population Trend in Maine

All statesWaterfowl

American Black Duck in Maine has collapsed: down 88% on the route-weighted index since 1968.

-88%Since 1968
56Routes In State
54Years

Notable American Black Duck Trends in Maine

long arc declinecomputed index

American Black Duck has collapsed in Maine: down 88% on the route-weighted index since 1968.

American Black Duck Population Forecast in Maine

If the recent trend holds, American Black Duck in Maine is projected to fall about 58% by 2029 — from 0.21 in 2024 to a central estimate of 0.09 (95% range 0.00–0.80). A 5-year backtest shows a typical error of ±357.2%, with 100% of held-out values landing inside the 95% band.

-58%Change by 2029
0.09Projected 2029 index
0.00–0.8095% range
±357.2%Backtest error
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 index95% low95% high
20250.130.000.85
20260.120.000.83
20270.110.000.82
20280.100.000.81
20290.090.000.80

American Black Duck Survey Routes in Maine

Routes recording American Black Duck in Maine.
Warren719891986
Harmony720151968
Hancock719981979
Horse Mtn520101984
Biddeford420001975
Manchester419951976
Carrabassett420001983
Benedicta419931993
Washburn419961987
Newcastle319941981
Otisfield Gr320111972
Hermon320112011
Seboomook Lk320141974
Medway320021976
Wilson Mills220241991
Reeds220241997
South Arm220121975
Bowdoin Ctr220031986
Brooks220061986
Deblois220071975
Northfield219761976
Carrying Pl220131980
Baxter219841984
Boundary219971993
Lake Moxie220162014

American Black Duck Population Trend in Other States

alabamaconnecticutdelawareindianamarylandmassachusettsmichiganminnesotanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiopennsylvaniarhode-islandvermontvirginiawest-virginiawisconsin

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