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Species · BCR 10 · BBS 2025 Release · 1966–2024

Snowy Egret In Northern Rockies

All regionsNorthern RockiesWetland birds

Snowy Egret in Northern Rockies has edged up: up 24% on the route-weighted index since 1991.

+24%Since 1991TrendPercent 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 RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
20YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 Snowy Egret in Northern Rockies. See the full index history below.

Forecast

If the recent trend holds, Snowy Egret in Northern Rockies is projected to fall about 38% by 2023 — from 0.06 in 2018 to a central estimate of 0.04 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±76.2%, with 80% of held-out values landing inside the 95% band.

-38%Change by 2023TrendPercent 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 →
0.04Projected 2023 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0995% 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 →
±76.2%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, Snowy Egret in Northern Rockies is projected to fall about 38% by 2023 — from 0.06 in 2018 to a central estimate of 0.04 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±76.2%, with 80% of held-out values landing inside the 95% band.19792023
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 →
20190.040.000.09
20200.040.000.09
20210.040.000.09
20220.040.000.09
20230.040.000.09

Routes In Northern Rockies

Routes recording Snowy Egret in Northern Rockies.
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 →
Neponset ResUTAH72018
RandolphUTAH12018
FontenelleWYOMING11991
Mtn ViewWYOMING11981
Green RiverWYOMING11981

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