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

Northern Bobwhite In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsGrassland birds

Northern Bobwhite in Tamaulipan Brushlands has fallen sharply: down 62% on the route-weighted index since 1969.

-62%Since 1969
28Routes In Region
57Years

Notable Signals

long arc declinecomputed index

Northern Bobwhite has fallen sharply in Tamaulipan Brushlands: down 62% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Northern Bobwhite in Tamaulipan Brushlands is projected to fall about 95% by 2029 — from 32 in 2024 to a central estimate of 1.5 (95% range 0.00–57). A 5-year backtest shows a typical error of ±75.6%, with 100% of held-out values landing inside the 95% band.

-95%Change by 2029
1.5Projected 2029 index
0.00–5795% range
±75.6%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
20258.80.0064
20266.90.0062
20275.10.0060
20283.30.0059
20291.50.0057

Routes In Tamaulipan Brushlands

Routes recording Northern Bobwhite in Tamaulipan Brushlands.
Mirando CityTEXAS672024
RachalTEXAS662023
RandadoTEXAS512024
San YgnacioTEXAS501985
George WestTEXAS492024
CatarinaTEXAS492010
DilleyTEXAS472024
Agua NuevaTEXAS462023
Millett 2TEXAS412024
HondoTEXAS352024
MillettTEXAS342012
ZapataTEXAS331987
Catarina 2TEXAS322017
SejitaTEXAS292024
El SauzTEXAS222023
Encinal 2TEXAS222024
El IndioTEXAS192007
EncinalTEXAS152010
RaymondvilleTEXAS152024
GuerraTEXAS142023
La PryorTEXAS122017
Catarina 3TEXAS122024
Cavasara Cr.TEXAS82023
KingsvilleTEXAS72024
Pedro CreekTEXAS72010

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