
A colony of Mexican free-tailed bats under the Yolo Bypass Wildlife Area. (Carolyn Cole / Los Angeles Times)

Corky Quirk is program coordinator for the Yolo Basin Foundation — and a bat aficionado. (Carolyn Cole / Los Angeles Times)

A Pallid bat at the Yolo Bypass Wildlife Area. (Carolyn Cole / Los Angeles Times)
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Thousands of bats from the Yolo Bypass Wildlife Area take flight at dusk. Bats play a vital role by eating insects that destroy crops. (Carolyn Cole / Los Angeles Times)