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

Blue Jay Population Trend in Wyoming

All statesGeneralists

Blue Jay in Wyoming has risen sharply: up 72% on the route-weighted index since 1975.

+72%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 →
17Routes 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 →
47YearsYears 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 72% 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 stay roughly flat through 2029, near 0.20 (95% range 0.06–0.34). A 5-year backtest shows a typical error of ±26%, with 100% of held-out values landing inside the 95% band.

+5%Change by 2029TrendPercent 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 →
0.20Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.06–0.3495% 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 →
±26%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 stay roughly flat through 2029, near 0.20 (95% range 0.06–0.34). A 5-year backtest shows a typical error of ±26%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20250.190.060.33
20260.190.060.33
20270.200.060.33
20280.200.060.34
20290.200.060.34

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
Moskee 3520242022
Sundance420241975
Moskee 2320192002
Seely220001990
Chugwater220212021
Gvnt Valley220191999
Shawnee219921992
Yoder220241969
Soda Well120212021
Redbird119711971
Piney119801980
Moskee120011980
Pine Bluff120171983
Dwyer120161992
Seely 2120242002
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 2026-05-22.