BirdAnalyst
Species · BCR 24 · BBS 2025 Release · 1966–2024

Hooded Merganser In Central Hardwoods

All regionsCentral HardwoodsWaterfowl

Hooded Merganser in Central Hardwoods has fallen sharply: down 52% on the route-weighted index since 1994.

-52%Since 1994TrendPercent 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 →
8Routes 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 →
13YearsYears 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 Hooded Merganser in Central Hardwoods. See the full index history below.

Routes In Central Hardwoods

Routes recording Hooded Merganser in Central Hardwoods.
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 →
JoyKENTUCKY71997
Beaverdam LkILLINOIS51995
EastviewKENTUCKY32002
PulaskiILLINOIS11996
WashingtonINDIANA12015
CumbackINDIANA11998
PorterKENTUCKY12021
GraydonMISSOURI12022

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