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

Cliff Swallow In Gulf Coastal Prairie

All regionsGulf Coastal PrairieAerial insectivores

Cliff Swallow in Gulf Coastal Prairie has surged: up 42× on the route-weighted index since 1980.

42×Since 1980
37Routes In Region
46Years

Notable Signals

long arc increasecomputed index

Cliff Swallow has surged in Gulf Coastal Prairie: up 42× on the route-weighted index since 1980.

Forecast

If the recent trend holds, Cliff Swallow in Gulf Coastal Prairie is projected to rise about 103% by 2029 — from 30 in 2024 to a central estimate of 61 (95% range 19–103). A 5-year backtest shows a typical error of ±111.7%, with 100% of held-out values landing inside the 95% band.

+103%Change by 2029
61Projected 2029 index
19–10395% range
±111.7%Backtest error
19782029
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
2025571598
20265816100
20275917101
20286018102
20296119103

Routes In Gulf Coastal Prairie

Routes recording Cliff Swallow in Gulf Coastal Prairie.
Goliad PrairieTEXAS5772016
Bayside 2TEXAS1702004
Rock IslandTEXAS1202024
WoodlawnLOUISIANA1112021
WinnieTEXAS1112024
Forked IslandLOUISIANA1062024
Oyster LakeTEXAS982024
Hinkles FerTEXAS732024
Moon LakeTEXAS632011
PetronilaTEXAS502024
StowellTEXAS502023
Port AcresTEXAS372024
McfaddinTEXAS352016
Padre Island PaisTEXAS322015
Bayside 3TEXAS302023
DanburyTEXAS202024
Forked Island 2LOUISIANA192011
HackberryLOUISIANA182014
Hackberry 2LOUISIANA152018
KaplanLOUISIANA142023
BaysideTEXAS112010
RichardLOUISIANA82023
Lag AtascosaTEXAS62021
Moon Lake 2TEXAS62024
Ltl ChenierLOUISIANA52024

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