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

Pied-billed Grebe In Central Hardwoods

All regionsCentral HardwoodsWetland birds

Pied-billed Grebe in Central Hardwoods has fallen sharply: down 75% on the route-weighted index since 1975.

-75%Since 1975TrendPercent 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 →
16YearsYears 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 Pied-billed Grebe in Central Hardwoods. See the full index history below.

Routes In Central Hardwoods

Routes recording Pied-billed Grebe 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 →
PinevilleMISSOURI71993
Lewis ForestTENNESSEE61975
Valhermoso SpgsALABAMA22000
Wheeler DamALABAMA12022
RupertARKANSAS11971
Brnt PrairieILLINOIS12009
PulaskiILLINOIS11995
CumbackINDIANA11968
EastviewKENTUCKY12002
CascadeMISSOURI11991

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