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

Rivoli's Hummingbird Population Trend in Arizona

All statesGeneralists

Rivoli's Hummingbird in Arizona has collapsed: down 76% on the route-weighted index since 1983.

-76%Since 1983TrendPercent 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 →
4Routes 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 Rivoli's Hummingbird Trends in ArizonaNotable 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 →

Rivoli's Hummingbird has collapsed in Arizona: down 76% on the route-weighted index since 1983.

Rivoli's Hummingbird Survey Routes in Arizona

Routes recording Rivoli's Hummingbird in Arizona.
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 →
Patagonia119831983
Sunizona119861986
Portal120241975
Mt. Graham120231997

Rivoli's Hummingbird Population Trend in Other States

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