BirdAnalyst
Species · BCR 11 · BBS 2025 Release · 1966–2024

American Black Duck In Prairie Potholes

All regionsPrairie PotholesWaterfowl

American Black Duck in Prairie Potholes has held roughly steady: up 10% on the route-weighted index since 1989.

+10%Since 1989TrendPercent 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 →
10Routes 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 →
12YearsYears 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 American Black Duck in Prairie Potholes. See the full index history below.

Routes In Prairie Potholes

Routes recording American Black Duck in Prairie Potholes.
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 →
DenbighNORTH-DAKOTA22011
Turtle MtnsNORTH-DAKOTA21999
DawsonMINNESOTA11989
TenneyMINNESOTA11980
LakotaNORTH-DAKOTA12000
WebsterNORTH-DAKOTA11998
RollaNORTH-DAKOTA12022
NilesNORTH-DAKOTA12017
CarpioNORTH-DAKOTA11992
Sheyenne LkNORTH-DAKOTA11985

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