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

Blue Jay Population Trend in Delaware

All statesGeneralists

Blue Jay in Delaware has held roughly steady: up 4% on the route-weighted index since 1968.

+4%Since 1968
17Routes In State
58Years

Notable Blue Jay Trends in Delaware

No notable trend signals for Blue Jay in Delaware. See the full index history below.

Blue Jay Population Forecast in Delaware

If the recent trend holds, Blue Jay in Delaware is projected to fall about 32% by 2029 — from 11 in 2024 to a central estimate of 7.8 (95% range 2.6–13). A 5-year backtest shows a typical error of ±19%, with 100% of held-out values landing inside the 95% band.

-32%Change by 2029
7.8Projected 2029 index
2.6–1395% range
±19%Backtest error
19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20258.12.913
20268.02.913
20278.02.813
20287.92.713
20297.82.613

Blue Jay Survey Routes in Delaware

Routes recording Blue Jay in Delaware.
Holleyville2720041966
Blackbird1820241994
Holleyville 21620242006
Milton 21420172017
Lowes Xrds1319911966
Dover1219871966
Wilmington1120141966
Frederica1120141966
Milton1120161966
Millsboro1120242017
Georgetown1120221992
Harrington820241966
Bethany Bch819901966
Frankford620121966
Pepperbox 2420242017
Mt Pleasant320191966
Pepperbox320161998

Blue Jay Population Trend in Other States

alabamaarkansascoloradoconnecticutfloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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