BonnieArbittier_bracken_cave_bat_bats_migration_cavern_nature_environment_sunset_sky_3-2-2018-10

Fran Hutchins, Bracken Cave Preserve Director, watches the bats fly away from Bracken Cave for the evening to feed. — Fran Hutchins, Bracken Cave Preserve Director, watches bats fly from Bracken Cave to feed. Credit: Bonnie Arbittier / San Antonio Report

Fran Hutchins, Bracken Cave Preserve Director, watches the bats fly away from Bracken Cave for the evening to feed.