This is just one part of the big room.

The Big Room

It has a café and benches in it now.

754 feet below the surface

The largest underground chamber in the world

Perimeter is about 1 ¼ miles long

Like other rooms, it has little pools everywhere

So big, it can fit 50 basketball courts

1,800 feet long and 250 feet wide

Males live to be about 13-18 years old.

Females live to about 12 yrs old.

In winter, they migrate to Mexico

9 cm long

Gray or dark brown

Scientific name: Tadaridabrasiliensis

Called free-tail, because their tail is not enclosed in

the membrane

Mexican Free-Tailed Bat

Picture:

Bats make up ¼ of all the

mammals in the world:

Bats

Other mammals