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

Brewer's Blackbird Population Trend in Oklahoma

All statesGeneralists

Brewer's Blackbird in Oklahoma has increased: up 30% on the route-weighted index since 1972.

+30%Since 1972TrendPercent 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 →
7Routes 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 →
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 Brewer's Blackbird Trends in OklahomaNotable 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 Brewer's Blackbird in Oklahoma. See the full index history below.

Brewer's Blackbird Survey Routes in Oklahoma

Routes recording Brewer's Blackbird in Oklahoma.
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 →
Beaver1019811981
Hardesty519881977
Ardmore519851985
Felt319721972
Tegarden219761968
Grimes119751975
Hollis120012000

Brewer's Blackbird Population Trend in Other States

arizonacaliforniacoloradoidahoindianamichiganminnesotamontananebraskanevadanew-mexiconorth-dakotaoregonsouth-dakotatexasutahwashingtonwisconsinwyoming

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