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

Purple Martin In Gulf Coastal Prairie

All regionsGulf Coastal PrairieAerial insectivores

Purple Martin in Gulf Coastal Prairie has risen sharply: up 53% on the route-weighted index since 1969.

+53%Since 1969
48Routes In Region
57Years

Notable Signals

long arc increasecomputed index

Purple Martin has risen sharply in Gulf Coastal Prairie: up 53% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Purple Martin in Gulf Coastal Prairie is projected to fall about 53% by 2029 — from 48 in 2024 to a central estimate of 23 (95% range 6.7–39). A 5-year backtest shows a typical error of ±69.8%, with 80% of held-out values landing inside the 95% band.

-53%Change by 2029
23Projected 2029 index
6.7–3995% range
±69.8%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
2025226.338
2026226.438
2027226.538
2028236.639
2029236.739

Routes In Gulf Coastal Prairie

Routes recording Purple Martin in Gulf Coastal Prairie.
Ltl ChenierLOUISIANA4712024
Hackberry 2LOUISIANA1242024
Forked Island 2LOUISIANA942011
Ltl Chenier 2LOUISIANA832011
Forked IslandLOUISIANA832024
EstherLOUISIANA812024
Oyster LakeTEXAS482024
JuniorLOUISIANA471991
LafitteLOUISIANA421991
Port AcresTEXAS402024
Loyola BeachTEXAS382009
Lag AtascosaTEXAS362024
IndianolaTEXAS362024
GlencoeLOUISIANA332018
WoodlawnLOUISIANA322021
Ville PlatteLOUISIANA312019
Gran ChenierLOUISIANA231982
CreoleLOUISIANA181987
HackberryLOUISIANA162016
Grand IsleLOUISIANA142019
MamouLOUISIANA131982
MauriceLOUISIANA132024
Loyola Beach 2TEXAS122024
ChinquapinTEXAS112024
Bayside 3TEXAS112024

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