The cave Cueva de la Boca is situated 14 miles from Monterrey. It is
famous for its sizeable bat population that numbers in the millions.
Original count of bats in Cueva de la Boca numbered approximately
twenty million. However due to human exploration of the cave the
number fell to 600,000. Makeshift torches were often made from
materials that upon burning harmed these small creatures. However
the damage was soon stopped and two years after official designation
of Cueva de la Boca as a bat roost the numbers went above two
Today the population in Cueva de la Boca seem to
grow. Mexican free tailed bats are primary residents of the cave.
Their main target is corn earworm moth that eats corn crops during
migration from Canada to Texas. Bats help agricultures by eating
approximately 15 tons of these bugs a night traveling up to 60 miles
a night. The bats leave Cueva de la Boca around 6 pm on daily hunts.
Then hundreds of thousands of these fury little creatures leave the
cave it is quiet a scene.