BirdAnalyst
Species · BCR 36 · BBS 2025 Release · 1966–2024

Eastern Meadowlark In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsGrassland birds

Eastern Meadowlark in Tamaulipan Brushlands has declined: down 43% on the route-weighted index since 1970.

-43%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 →
24Routes 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 →
56YearsYears 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 Eastern Meadowlark in Tamaulipan Brushlands. See the full index history below.

Eastern Meadowlark In Tamaulipan Brushlands Population Forecast

If the recent trend holds, Eastern Meadowlark in Tamaulipan Brushlands is projected to fall about 100% by 2029 — from 8.4 in 2024 to a central estimate of 0.00 (95% range 0.00–37). A 5-year backtest shows a typical error of ±121.3%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029TrendPercent 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 →
0.00Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–3795% 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 →
±121.3%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, Eastern Meadowlark in Tamaulipan Brushlands is projected to fall about 100% by 2029 — from 8.4 in 2024 to a central estimate of 0.00 (95% range 0.00–37). A 5-year backtest shows a typical error of ±121.3%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20250.000.0037
20260.000.0037
20270.000.0037
20280.000.0037
20290.000.0037

Routes In Tamaulipan Brushlands

Routes recording Eastern Meadowlark 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 →
George WestTEXAS442024
HondoTEXAS232024
RachalTEXAS142023
ZapataTEXAS141987
GuerraTEXAS122023
KingsvilleTEXAS102024
RaymondvilleTEXAS92024
MillettTEXAS72012
RandadoTEXAS62024
El SauzTEXAS52023
ProgresoTEXAS42011
Millett 2TEXAS42024
Pedro CreekTEXAS32003
Mirando CityTEXAS22024
Catarina 3TEXAS22019
HeidelbergTEXAS22024
Agua NuevaTEXAS12023
EncinalTEXAS12004
CatarinaTEXAS12010
La PryorTEXAS12017
Catarina 2TEXAS12017
DilleyTEXAS12021
SejitaTEXAS12024
Cavasara Cr.TEXAS12008

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