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

Purple Martin In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsAerial insectivores

Purple Martin in Tamaulipan Brushlands has surged: up 142% on the route-weighted index since 1969.

+142%Since 1969
24Routes In Region
57Years

Notable Signals

long arc increasecomputed index

Purple Martin has surged in Tamaulipan Brushlands: up 142% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Purple Martin in Tamaulipan Brushlands is projected to fall about 31% by 2029 — from 11 in 2024 to a central estimate of 7.6 (95% range 0.00–18). A 5-year backtest shows a typical error of ±49.8%, with 100% of held-out values landing inside the 95% band.

-31%Change by 2029
7.6Projected 2029 index
0.00–1895% range
±49.8%Backtest error
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 index95% low95% high
20257.90.0019
20267.80.0019
20277.70.0019
20287.70.0019
20297.60.0018

Routes In Tamaulipan Brushlands

Routes recording Purple Martin in Tamaulipan Brushlands.
George WestTEXAS802024
Millett 2TEXAS192024
HondoTEXAS172024
RachalTEXAS142023
Mirando CityTEXAS132022
ProgresoTEXAS132007
ZapataTEXAS121984
KingsvilleTEXAS102024
La PryorTEXAS72004
Agua NuevaTEXAS52023
El IndioTEXAS41994
RaymondvilleTEXAS42019
MillettTEXAS42010
CatarinaTEXAS32008
DilleyTEXAS32018
Encinal 2TEXAS32024
RandadoTEXAS22023
Catarina 2TEXAS22013
Catarina 3TEXAS22024
SejitaTEXAS22023
Cavasara Cr.TEXAS22013
EncinalTEXAS12010
El SauzTEXAS12005
HeidelbergTEXAS12024

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