BirdAnalyst
Species · BCR 37 · BBS 2026 Release · 1966–2025

Dickcissel In Gulf Coastal Prairie

All regionsGulf Coastal PrairieGrassland birds

Dickcissel in Gulf Coastal Prairie has held roughly steady: down 3% on the route-weighted index since 1969.

-3%Since 1969TrendPercent 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 →
40Routes 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 →
58YearsYears 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 Dickcissel in Gulf Coastal Prairie. See the full index history below.

Dickcissel In Gulf Coastal Prairie Population Forecast

If the recent trend holds, Dickcissel in Gulf Coastal Prairie is projected to fall about 25% by 2030 — from 16 in 2025 to a central estimate of 12 (95% range 0.64–24). A 5-year backtest shows a typical error of ±31.1%, with 100% of held-out values landing inside the 95% band.

-25%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 →
12Projected 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 →
0.64–2495% 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 →
±31.1%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, Dickcissel in Gulf Coastal Prairie is projected to fall about 25% by 2030 — from 16 in 2025 to a central estimate of 12 (95% range 0.64–24). A 5-year backtest shows a typical error of ±31.1%, with 100% of held-out values landing inside the 95% band.19672030
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 →
2026130.8924
2027120.8324
2028120.7624
2029120.7024
2030120.6424

Routes In Gulf Coastal Prairie

Routes recording Dickcissel in Gulf Coastal Prairie.
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 →
Bayside 3TEXAS902025
Goliad PrairieTEXAS882016
PetronilaTEXAS822025
Oyster LakeTEXAS702025
Ltl Chenier 2LOUISIANA322011
MamouLOUISIANA281982
Bayside 2TEXAS242004
ChinquapinTEXAS192025
Rock IslandTEXAS162025
Loyola Beach 2TEXAS162025
DanburyTEXAS152025
KatyTEXAS142025
Ville PlatteLOUISIANA132019
WinnieTEXAS132025
IndianolaTEXAS102023
StowellTEXAS102025
McfaddinTEXAS82016
WoodlawnLOUISIANA72021
Lag AtascosaTEXAS72025
MauriceLOUISIANA52024
Hackberry 2LOUISIANA52021
VanderbiltTEXAS41976
KaplanLOUISIANA32023
EstherLOUISIANA22022
Hinkles FerTEXAS22025

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