BirdAnalyst
Species · BCR 20 · BBS 2025 Release · 1966–2024

Common Grackle In Edwards Plateau

All regionsEdwards PlateauGeneralists

Common Grackle in Edwards Plateau has surged: up 198% on the route-weighted index since 1979.

+198%Since 1979
13Routes In Region
47Years

Notable Signals

long arc increasecomputed index

Common Grackle has surged in Edwards Plateau: up 198% on the route-weighted index since 1979.

Forecast

If the recent trend holds, Common Grackle in Edwards Plateau is projected to fall about 21% by 2029 — from 2.1 in 2024 to a central estimate of 1.7 (95% range 0.00–5.4). A 5-year backtest shows a typical error of ±18.6%, with 100% of held-out values landing inside the 95% band.

-21%Change by 2029
1.7Projected 2029 index
0.00–5.495% range
±18.6%Backtest error
19772029
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
20251.70.005.5
20261.70.005.5
20271.70.005.4
20281.70.005.4
20291.70.005.4

Routes In Edwards Plateau

Routes recording Common Grackle in Edwards Plateau.
ManorTEXAS202024
Dripping SpgTEXAS142024
HarperTEXAS42021
BoerneTEXAS32019
LeanderTEXAS32006
KempnerTEXAS22016
Valley SpgsTEXAS12019
San SabaTEXAS12008
PidcokeTEXAS11995
AdamsvilleTEXAS12013
MontellTEXAS12009
Prairie Mtn.TEXAS12016
Allen CreekTEXAS12018

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