BirdAnalyst
Species · BCR 37 · BBS 2025 Release · 1966–2024

Olive Sparrow In Gulf Coastal Prairie

All regionsGulf Coastal PrairieGeneralists

Olive Sparrow in Gulf Coastal Prairie has surged: up 11× on the route-weighted index since 1971.

11×Since 1971
8Routes In Region
51Years

Notable Signals

long arc increasecomputed index

Olive Sparrow has surged in Gulf Coastal Prairie: up 11× on the route-weighted index since 1971.

Forecast

If the recent trend holds, Olive Sparrow in Gulf Coastal Prairie is projected to rise about 88% by 2029 — from 1.7 in 2024 to a central estimate of 3.2 (95% range 1.3–5.1). A 5-year backtest shows a typical error of ±62.3%, with 100% of held-out values landing inside the 95% band.

+88%Change by 2029
3.2Projected 2029 index
1.3–5.195% range
±62.3%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
20253.01.14.9
20263.11.25.0
20273.11.25.0
20283.21.35.1
20293.21.35.1

Routes In Gulf Coastal Prairie

Routes recording Olive Sparrow in Gulf Coastal Prairie.
Lag AtascosaTEXAS262024
Loyola BeachTEXAS212009
San PedroTEXAS182023
Loyola Beach 2TEXAS92024
L. Atascosa NwrTEXAS62023
Bayside 2TEXAS21998
PetronilaTEXAS12024
Bayside 3TEXAS12023

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