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Species · Virginia · BBS 2026 Release · 1966–2025

Glossy Ibis Population Trend in Virginia

All statesWetland birds

Glossy Ibis in Virginia has increased: up 44% on the route-weighted index since 1979.

+44%Since 1979TrendPercent 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 →
5Routes 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 →
30YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Glossy Ibis Trends in VirginiaNotable 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 Glossy Ibis in Virginia. See the full index history below.

Glossy Ibis Population Forecast in Virginia

If the recent trend holds, Glossy Ibis in Virginia is projected to rise about 621% by 2030 — from 0.15 in 2025 to a central estimate of 1.1 (95% range 0.00–3.4). A 5-year backtest shows a typical error of ±1444.3%, with 80% of held-out values landing inside the 95% band.

+621%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 →
1.1Projected 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 →
0.00–3.495% 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 →
±1444.3%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, Glossy Ibis in Virginia is projected to rise about 621% by 2030 — from 0.15 in 2025 to a central estimate of 1.1 (95% range 0.00–3.4). A 5-year backtest shows a typical error of ±1444.3%, with 80% 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 →
20260.990.003.3
20271.00.003.3
20281.00.003.3
20291.00.003.4
20301.10.003.4

Glossy Ibis Survey Routes in Virginia

Routes recording Glossy Ibis in Virginia.
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 →
Pungo720252025
Cornland219951995
Quinby119791969
Chincoteag W120241992
Cape Charles120171992

Glossy Ibis Population Trend in Other States

alabamaconnecticutdelawarefloridageorgialouisianamainemarylandmassachusettsnew-hampshirenew-jerseynew-yorknorth-carolinarhode-islandsouth-carolinasouth-dakotatexas

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