The largest urban bat colony in Austin.

Austin owns the largest urban colony of bats all over the world - which is a 1.5 million population. They stay beneath the Congress Bridge of the downtown area of Austin, TX and head to the forest for their food during dusk. More than one million bats are flying in the sky at the same time and it is the splendour of the nature.

Freetail bats migrate between Mexico and Austin from Spring March to Fall September. Late August or early September is the best timing for bats watching because the next generation have been able to fly together with their parents, which means the population reaches its maximum. The daily foraging timing varies from 8:00pm to 8:30pm in different months but basically they will depart the bridge at the sunset. They will head to the west side of the bridge and tons of insects have been in their stomach after they return. The departing process will last for 15 minutes.