Winter / Migration
November to February
Lower activity. Many bats migrate south, and visible emergence is often limited or absent.
NovDecJanFeb
Seasonal Planning
Austin Bat Season Calendar
Use this calendar to set expectations for what the nightly emergence may look like throughout the year. Summer is usually strongest, while winter is generally sparse.
November to February
Spring Ramp-Up
March to April
Activity returns and increases as temperatures warm. Good nights become more frequent.
MarApr
Peak Viewing
May to September
Most consistent and dramatic emergence window for visitors.
MayJunJulAugSep
Fall Transition
October
Still active, but consistency drops as cooler weather and migration patterns begin shifting.
Oct
Month-by-Month Guide
Quick reference for expected activity around the bridge.
January
LowMigration period, occasional small flights.
February
LowStill generally dormant at the bridge.
March
RisingRebound starts; warmer nights improve chances.
April
ModerateMore regular emergence near dusk.
May
HighStrong viewing month with frequent flights.
June
HighPrime viewing window for visitors.
July
HighPeak summer activity and heavy bridge crowds.
August
HighStill highly active with warm evening conditions.
September
HighOften excellent before fall transition.
October
ModerateCan be good, but less predictable than summer.
November
LowMigration continues and sightings thin out.
December
LowMostly dormant period at this location.