Mexican Free-tailed Bat

Tadarida brasiliensis

Mexican Free-tailed Bat (Tadarida brasiliensis)
Image: Wikipedia / Wikimedia Commons, CC BY-SA, wikipedia

The Mexican free-tailed bat or Brazilian free-tailed bat is a medium-sized bat native to North, Central, and South America and the Caribbean, so named because its tail can be almost half its total length and is not attached to its uropatagium. It has been claimed to have the fastest horizontal speed of any animal, reaching level flight speed of up to 99 mph (160 km/h). It also flies the highest among bats, at altitudes around 3,300 m (10,800 ft). Source

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In the last 8 weeks this bat was recorded 70,471 times across 24 areas (each area is a 5 degree square).

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Figures are effort corrected and come from automatic sound identification, which makes mistakes. How this is measured and how it compares with human observers.