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More than 10,000 Mexican free-tailed bats emerge nightly from Phoenix Bat Cave; best viewing May through mid-October

3270822 · May 12, 2025

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Summary

A media segment described a nightly summer emergence of Mexican free-tailed bats from a flood-control tunnel called the Phoenix Bat Cave near Camelback and Fortieth Street, noting the bats arrive in early May, leave by mid-October and that the best viewing is just before sunset.

More than 10,000 Mexican free-tailed bats emerge each summer night from the Phoenix Bat Cave, a flood-control tunnel near Camelback and Fortieth Street, the host of Phoenix in Nevada Minute said. The host and a presenter on the segment said the bats arrive in early May and depart by mid-October.

The nightly emergence is part of the bats' migration activity and offers a seasonal wildlife viewing opportunity. The segment said the bats use the tunnel each summer and that the site has been used in this way since 1994, when the pattern began to be observed regularly, according to the presenter.

The presenter identified the species as the Mexican free-tailed bat and described its nightly activity: the bats fly out of the flood-control tunnel to capture insects as temperatures begin to cool and to continue their migration toward Mexico. The segment advised viewers that "And the best time to arrive is just before sunset," the presenter said.

The segment did not specify exact access points, viewing rules, or whether any formal tours or safety guidelines are offered. Viewers interested in seeing the emergence should check local guidance and respect any posted signs or restrictions at the site.