BirdAnalyst
Species · Oklahoma · BBS 2026 Release · 1966–2025

American Avocet Population Trend in Oklahoma

All statesShorebirds

American Avocet in Oklahoma has surged: up 210% on the route-weighted index since 1983.

+210%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 →
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 →
24YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable American Avocet 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 →

long arc increasecomputed 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 →

American Avocet has surged in Oklahoma: up 209% on the route-weighted index since 1983.

American Avocet Population Forecast in Oklahoma

If the recent trend holds, American Avocet in Oklahoma is projected to rise about 101% by 2030 — from 0.15 in 2025 to a central estimate of 0.30 (95% range 0.00–0.63). A 5-year backtest shows a typical error of ±180.1%, with 100% of held-out values landing inside the 95% band.

+101%Change by 2030TrendPercent 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 →
0.30Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.6395% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±180.1%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, American Avocet in Oklahoma is projected to rise about 101% by 2030 — from 0.15 in 2025 to a central estimate of 0.30 (95% range 0.00–0.63). A 5-year backtest shows a typical error of ±180.1%, with 100% of held-out values landing inside the 95% band.19792030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.280.000.61
20270.280.000.62
20280.290.000.62
20290.290.000.63
20300.300.000.63

American Avocet Survey Routes in Oklahoma

Routes recording American Avocet 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 →
Cooperton1020142014
Hooker420251992
Hardesty319831982
Rosston219871987
Beaver220181979
Clear Lake220041996
Keyes220231996

American Avocet Population Trend in Other States

arizonacaliforniacoloradoidahokansaslouisianaminnesotamontananebraskanevadanew-mexiconorth-dakotaoregonsouth-dakotatexasutahwashingtonwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.