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

Blue Jay Population Trend in Wyoming

All statesForest birds

Blue Jay in Wyoming has risen sharply: up 57% on the route-weighted index since 1975.

+57%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 →
18Routes 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 →
48YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Blue Jay Trends in WyomingNotable 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 →

Blue Jay has risen sharply in Wyoming: up 57% on the route-weighted index since 1975.

Blue Jay Population Forecast in Wyoming

If the recent trend holds, Blue Jay in Wyoming is projected to rise about 100% by 2030 — from 0.10 in 2025 to a central estimate of 0.19 (95% range 0.05–0.33). A 5-year backtest shows a typical error of ±36.3%, with 100% of held-out values landing inside the 95% band.

+100%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 →
0.19Projected 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 →
0.05–0.3395% 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 →
±36.3%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, Blue Jay in Wyoming is projected to rise about 100% by 2030 — from 0.10 in 2025 to a central estimate of 0.19 (95% range 0.05–0.33). A 5-year backtest shows a typical error of ±36.3%, with 100% of held-out values landing inside the 95% band.19692030
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 →
20260.180.050.32
20270.190.050.33
20280.190.050.33
20290.190.050.33
20300.190.050.33

Blue Jay Survey Routes in Wyoming

Routes recording Blue Jay in Wyoming.
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 →
Lingle520241980
Seely 2320252002
Moskee 2320192002
Moskee 3320252022
Sundance220251975
Seely220001990
Chugwater220212021
Gvnt Valley220191999
Shawnee219921992
Yoder220241969
Dayton120252025
Redbird119711971
Soda Well120212021
Piney119801980
Moskee120011980
Pine Bluff120171983
Dwyer120161992
Mayoworth119921992

Blue Jay Population Trend in Other States

alabamaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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