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

Chimney Swift In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsAerial insectivores

Chimney Swift in Tamaulipan Brushlands has declined: down 40% on the route-weighted index since 1970.

-40%Since 1970
24Routes In Region
55Years

Notable Signals

No notable trend signals for Chimney Swift in Tamaulipan Brushlands. See the full index history below.

Forecast

If the recent trend holds, Chimney Swift in Tamaulipan Brushlands is projected to fall about 22% by 2029 — from 0.83 in 2024 to a central estimate of 0.65 (95% range 0.00–3.5). A 5-year backtest shows a typical error of ±35%, with 100% of held-out values landing inside the 95% band.

-22%Change by 2029
0.65Projected 2029 index
0.00–3.595% range
±35%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
20250.820.003.7
20260.780.003.6
20270.730.003.6
20280.690.003.6
20290.650.003.5

Routes In Tamaulipan Brushlands

Routes recording Chimney Swift in Tamaulipan Brushlands.
EncinalTEXAS42004
CatarinaTEXAS41999
HeidelbergTEXAS42023
ZapataTEXAS31974
RandadoTEXAS32024
George WestTEXAS32024
Pedro CreekTEXAS32005
KingsvilleTEXAS22023
GuerraTEXAS22018
Encinal 2TEXAS22022
SejitaTEXAS22018
MillettTEXAS22009
RachalTEXAS12013
Mirando CityTEXAS12024
San YgnacioTEXAS11967
La PryorTEXAS12003
HondoTEXAS12024
RaymondvilleTEXAS12024
El SauzTEXAS12023
DilleyTEXAS12022
ProgresoTEXAS12011
LaredoTEXAS12017
Millett 2TEXAS12024
Cavasara Cr.TEXAS11998

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