BirdAnalyst
Species · BCR 36 · BBS 2026 Release · 1966–2025

Green Heron In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsWetland birds

Green Heron in Tamaulipan Brushlands has edged up: up 18% on the route-weighted index since 1970.

+18%Since 1970TrendPercent 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 →
23Routes 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 →
55YearsYears 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 Green Heron in Tamaulipan Brushlands. See the full index history below.

Green Heron In Tamaulipan Brushlands Population Forecast

If the recent trend holds, Green Heron in Tamaulipan Brushlands is projected to stay roughly flat through 2030, near 0.38 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±124.8%, with 100% of held-out values landing inside the 95% band.

+5%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 →
0.38Projected 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 →
0.00–1.295% 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 →
±124.8%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, Green Heron in Tamaulipan Brushlands is projected to stay roughly flat through 2030, near 0.38 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±124.8%, 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 →
20260.420.001.3
20270.410.001.2
20280.400.001.2
20290.390.001.2
20300.380.001.2

Routes In Tamaulipan Brushlands

Routes recording Green Heron in Tamaulipan Brushlands.
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 →
Catarina 2TEXAS42011
ZapataTEXAS31983
George WestTEXAS32022
RaymondvilleTEXAS32025
MillettTEXAS32012
San YgnacioTEXAS21985
CatarinaTEXAS22007
LaredoTEXAS22019
HeidelbergTEXAS22022
Agua NuevaTEXAS12009
KingsvilleTEXAS12024
RandadoTEXAS11982
Mirando CityTEXAS12012
EncinalTEXAS12008
La PryorTEXAS12003
HondoTEXAS12025
El IndioTEXAS12000
El SauzTEXAS11994
GuerraTEXAS12013
Encinal 2TEXAS12024
ProgresoTEXAS12010
Pedro CreekTEXAS12005
Cavasara Cr.TEXAS12013

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