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

Pied-billed Grebe In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsWetland birds

Pied-billed Grebe in Tamaulipan Brushlands has fallen sharply: down 70% on the route-weighted index since 1970.

-70%Since 1970
9Routes In Region
21Years

Notable Signals

long arc declinecomputed index

Pied-billed Grebe has fallen sharply in Tamaulipan Brushlands: down 70% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Pied-billed Grebe in Tamaulipan Brushlands is projected to fall about 92% by 2026 — from 0.11 in 2021 to a central estimate of 0.01 (95% range 0.00–0.65). A 5-year backtest shows a typical error of ±114.7%, with 100% of held-out values landing inside the 95% band.

-92%Change by 2026
0.01Projected 2026 index
0.00–0.6595% range
±114.7%Backtest error
19672026
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
20220.040.000.68
20230.030.000.67
20240.030.000.67
20250.020.000.66
20260.010.000.65

Routes In Tamaulipan Brushlands

Routes recording Pied-billed Grebe in Tamaulipan Brushlands.
ZapataTEXAS31968
RaymondvilleTEXAS31981
George WestTEXAS21994
Catarina 2TEXAS22013
RachalTEXAS12012
KingsvilleTEXAS11992
RandadoTEXAS11967
CatarinaTEXAS12010
HondoTEXAS12021

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