BirdAnalyst
Species · Montana · BBS 2025 Release · 1966–2024

Barrow's Goldeneye Population Trend in Montana

All statesWaterfowl

Barrow's Goldeneye in Montana has collapsed: down 86% on the route-weighted index since 1985.

-86%Since 1985TrendPercent 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 StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
15YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Barrow's Goldeneye Trends in MontanaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Barrow's Goldeneye has collapsed in Montana: down 86% on the route-weighted index since 1985.

Barrow's Goldeneye Survey Routes in Montana

Routes recording Barrow's Goldeneye in Montana.
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 →
Sunburst620002000
Red Rock619951994
Augusta420142014
St Mary319941971
Hebgen Lake220242018
Logan Pass119941994
Wise River120052005
Elliston120182013

Barrow's Goldeneye Population Trend in Other States

alaskacoloradoidahooregonwashingtonwyoming

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