There are 23 bat species that live in California and 13 of those can be found here in Marin County. Tiny but mighty, the amazing creature you see here is a Mexican Free-tailed Bat, known to speed through the skies at altitudes over 10,000 feet while reaching ground speeds of nearly 100 miles per hour! Like most bats, these stealthy insectivores use echolocation to hunt prey, usually in mid-flight. The Mexican Free-tailed bat (also known as the Brazilian Free-tailed Bat) is remarkable enough as a