âI have to ask you to be very, very quiet as we enter the next chamber,â she said in a soft voice. âThe Ravensburg Caverns are home to many creatures, including troglophiles, trogloxenes, and troglobites. Who can guess what those are?â
For a moment Bobby looked like he wanted to say somethingâbut one look at Mrs. Hallettâs face convinced him to keep his mouth shut.
âNo, they arenât dinosaurs,â Mrs. Hallett said, wagging her finger at Bobbyâeven though he hadnât said a word. She was the only one who laughed at her joke. âA troglophile is an animal that usually lives in a cave, but can leave the cave from time to time if it wants.Troglophiles can include beetles, millipedes, centipedes, and other creepy-crawly creatures. They prefer dimly lit areas and will rarely venture into bright light. Then, of course, there are trogloxenesâanimals who live in the cave, but have to leave it to find food. And a troglobite ââ
A thin smile snaked across Mrs. Hallettâs face. âWell, weâll talk about those a little later. The next room of the caverns is home to hundreds of trogloxenes. Or, as theyâre more commonly known in this caseâ bats. â
Some of the girls squealed, but Mrs. Hallett silenced them with a stern look and a finger to her lips. âTheyâre sleeping right now . . . or, at least, they should be. So if youâre quiet as we pass through their chamber, they shouldnât bother us. I hope!â
Kristi turned to Olivia and rolled her eyesâbut to her surprise, Olivia seemed pale. âYou okay?â Kristi whispered.
âAsk her something for me?â Olivia said in a rush.
But it was too late. Mrs. Hallett was already walking into the next chamber and the seventh graders were following. The lights seemed even dimmer here, or perhaps the impossibly high cave ceilings somehow suckedup most of their brightness. There was still enough light, however, for Kristi to see them: bats, hundreds of them, thousands of them, hanging above their heads, from every ledge and rocky outcropping in the chamber. Wrapped in their wings, the batsâ bodies swayed as they slept, rocked by an invisible current of air.
Why? wondered Kristi. How? How is there a breeze in here, underground? Where could it be coming from?
Every so often one of the bats stretched in its sleep, unfurling those leathery wings before wrapping itself up again and falling back into a fitful doze. Kristi had the sense that they slept lightly, very lightly, and that it wouldnât take much commotion to wake them. To imagine it was awfulâthe rushing wings beating over their heads as panicked, angry bats fled the cave, flying low with fangs bared and talons tangled in the kidsâ hair and hoodies.
Luckily, her classmates seemed to sense that too, and everyone was silent as they movedâfaster than usualâthrough the batsâ chamber.
On the other side, Kristi breathed a sigh of relief. Then she turned to Olivia. âWhat did you want me to do?â
âCan you ask her about moths?â said Olivia.
âHuh? Ask her what about moths?â Kristi replied.
âYou know. If there are moths in the cave,â Olivia said impatiently. âThose troglo-whatevers she wouldnât tell us about. Maybe theyâre a kind of horrible moth like that thing that was in my grab bag.â
âOhhhh,â Kristi said, nodding. No wonder Olivia looked so pale. Kristi had never really understood her best friendâs phobia of moths, but she knew what it was like to be so terrified of something that it was hard to even talk about it. So she didnât hesitate to raise her hand.
âYes, girl in the red sweater?â Mrs. Hallett said.
âI was wondering if any moths live in the Ravensburg Caverns,â Kristi said.
âMoths?â Mrs. Hallett said. âOh, probably. Near the entrance of the caves, like