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

Great-tailed Grackle In Edwards Plateau

All regionsEdwards PlateauGeneralists

Great-tailed Grackle in Edwards Plateau has surged: up 607% on the route-weighted index since 1973.

+607%Since 1973
16Routes In Region
51Years

Notable Signals

long arc increasecomputed index

Great-tailed Grackle has surged in Edwards Plateau: up 607% on the route-weighted index since 1973.

Forecast

If the recent trend holds, Great-tailed Grackle in Edwards Plateau is projected to fall about 34% by 2029 — from 4.4 in 2024 to a central estimate of 2.9 (95% range 0.00–6.9). A 5-year backtest shows a typical error of ±53.1%, with 100% of held-out values landing inside the 95% band.

-34%Change by 2029
2.9Projected 2029 index
0.00–6.995% range
±53.1%Backtest error
19692029
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
20252.80.006.8
20262.80.006.8
20272.90.006.8
20282.90.006.8
20292.90.006.9

Routes In Edwards Plateau

Routes recording Great-tailed Grackle in Edwards Plateau.
ManorTEXAS712024
LeanderTEXAS312006
GeorgetownTEXAS181985
PidcokeTEXAS152014
BoerneTEXAS122010
Allen CreekTEXAS52001
Prairie Mtn.TEXAS42022
FitzhughTEXAS21983
HarperTEXAS22018
AdamsvilleTEXAS21973
MontellTEXAS22016
UtopiaTEXAS12007
Valley SpgsTEXAS12013
San SabaTEXAS11994
KempnerTEXAS12017
Dripping SpgTEXAS12013

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