Vampire Bats And Other Blood-Sucking Creatures Bill Schutt, author of Dark Banquet: Blood and the Curious Lives of Blood-Feeding Creatures, discusses the real "vampires" in this Halloween-day edition of Science Friday.
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Vampire Bats And Other Blood-Sucking Creatures

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Vampire Bats And Other Blood-Sucking Creatures

Vampire Bats And Other Blood-Sucking Creatures

Vampire Bats And Other Blood-Sucking Creatures

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Bill Schutt, author of Dark Banquet: Blood and the Curious Lives of Blood-Feeding Creatures, discusses the real "vampires" in this Halloween-day edition of Science Friday.

JOE PALCA, host:

From NPR News, this is Talk of the Nation, Science Friday. I am Joe Palca. Later in the hour, a new exhibition at the intersection of science and beauty, but first it's Halloween and we're going to talk about a creature that has fangs, drinks blood, and comes out only at night and that is the aptly-named creature, the vampire bat. Vampire bats lived in the tropical of Central and South America. They scour the night for unsuspecting prey like chickens and cows, slice the skin or hide of their prey with razor-sharp teeth, and gently lick the wound, collecting the draining stream of blood with their mouths.

And my next guest has raised this delicate blood-letters. He joins me know to talk about them and other creatures that are happy to drink your blood. Bill Schutt is the author of the new book, "Dark Banquet: Blood and the Curious Lives of Blood-Feeding Creatures." He is also an associate professor of biology at the CW Post-College of Long Island University, and he is also a research associate in mammalogy at the American Museum of National History in New York. He joins on the phone from Connecticut today. Welcome to the program, Dr. Schutt.

Dr. DAVID SCHUTT (Author/Professor, Dark Banquet: Blood and the Curious Lives of Blood-Feeding Creatures): It's a pleasure to be on your show.

PALCA: Well, so first of all, what, I am curious, drew you to the study of vampire bats in the first place?

Dr. SCHUTT: Well, I guess, I've always been into strange animals when I was a kid. You know, I was the kid who had a monkey, and a boa constrictor, and all sorts of weird critters so, you know, 30 years later when people contact me for the first time in a long time, and they find out that I spent a lot of time studying vampire bats as part of my career, they are not surprised.

PALCA: They go, what figures.

Dr. SCHUTT: Exactly.

PALCA: What would else would you expect from young Bill Schutt? Oh, I should remind people are our number is 800-989-8255, that's 800-989-TALK, and if you want to talk with Bill Schutt about vampire bats or several of the other interesting blood-sucking. I guess, we think of it as sucking but actually, they, I guess, it drips into their mouth. You describe this interesting capillary tubes that sort of help extract the blood. But my question is, you make the point in the book, I thought it was interesting that, you know, blood is not the world's most nutritious substance. You have to have a specialized digestive system to get a satisfactory meal out of it.

Dr. SCHUTT: Yeah. Not only a specialized digestive system, but basically your entire physiology needs to be highly evolved in order to deal with the fact that blood for instance doesn't have any fat in it. So you can't store fat, which means that you have to feed on blood every day. And that presents some major problems.

PALCA: So, such as.

Dr. SCHUTT: Well, you can't hibernate.

PALCA: So vampire bats don't hibernate, that's why there in the tropics I presume.

Dr. SCHUTT: Excuse me.

PALCA: I say, vampire bats don't hibernate so they're in the tropics, unlike the brown bats that we were just hearing about in New York State, they do hibernate.

Dr. SCHUTT: Yes, that's the reason why you're never going to find them in the United States, because the bats around here run out of insects during the fall and winter and so they get by, by hibernating. Vampire bats would never be able to do that.

PALCA: I guess, you also have to have pretty sophisticated kidneys or blood - I mean, water-balanced mechanisms because blood is mostly water anyway.

Dr. SCHUTT: Exactly. They've got to get rid of - initially, they have to get rid of high amount of water. So while they're feeding, they're actually urinating. And then it becomes a problem of conserving water at a certain point so their kidneys kick into a second gear that turns into a more of a water conservation device. So any of the anatomical systems that you look at in a vampire bat digestive system, you know, their reproductive systems, anything you can think of is really neat to study from an anatomical point of view.

PALCA: All right. So, have you ever been bitten by a vampire bat?


PALCA: Are there reports of them biting humans?

Dr. SCHUTT: Oh, yeah. I mean, nowadays, these are or generally really poor people who are living in areas where for example, you don't have screens or doors. But if you're out camping in the middle of an area where vampire bats exist, and you're not using mosquito nets then, yeah, you can get bitten. It doesn't happen very often but it does happen. Primarily, vampire bats are feeding on livestock and other animals.

PALCA: I see but I guess, what I am curious about is the bite of a vampire bat painful? I mean, would you know that you've been bitten by - one of this - the teeth are so sharp and the wound is so small that it wouldn't bother you.

Dr. SCHUTT: Well, if you were handling a vampire bat and got bit, you would know that in a hurry because with the animal struggling and frightened, it could put a real hurt on you and put a serious bite onto you. If it's sneaking up and trying to feed, that's a completely different matter and most likely if you were asleep, you would never know that you'd been bitten because the - their teeth are so sharp that they generally make a painless bite when they do bite - when they're looking for food.

PALCA: All right, interesting. I thought I suspected because you describe some of these animals that they sort of nuzzle up to these chickens and trick the chicken into thinking their young is coming along, then take a little snack.

Dr. SCHUTT: Yeah, that's the white-wing vampire bat and we saw that behavior with that colony that I was keeping at Cornell University when I was a graduate student there. The bat approached the birds, we thought the bird was going to attack at the bat, and suddenly the bat went underneath the breast of the birds, and sort of snuggled into this region where the chicks usually go to warm themselves, and the bird just kind of hunkered down and fell asleep and meanwhile, we saw this - a couple of minutes later - we see this trail of blood coming out from underneath the bird. The bat was feeding underneath this hen.

PALCA: Clever bat.

Dr. SCHUTT: Yeah, great stuff.

PALCA: Let's take a call now. Remember, our number is 800-989-8255. Let's go to Gayle(ph) in San Antonio, Texas. Gayle, welcome to Science Friday.

GAYLE (Caller): Welcome, thank you. Hi.


GAYLE: I have a question. A friend of mine - I have an interest in entomology, insects, and so a friend of mine told me about this new moth that they had found would actually drink blood and they - I got to watch a bit of the video on the Internet where it was showing, you know, sticking its probe into a finger and another part it was, you know, on the person's face and it was actually drinking the blood and, I didn't get to watch the whole program so I was hoping that he could tell us a little bit more about that if he knew.

PALCA: Blood-thirsty moth.

Dr. SCHUTT: I think that that, excuse me, I think that moth lives in Southeast Asia, if I'm not wrong, and it's really one of the creatures that I wanted to study but didn't get a chance to. So, I do know that not a whole lot is known about its behavior except that it's got this curious diet and do you remember if this was an Asian species?

GAYLE: It was, and I remember that the person studying it was female but yeah, she was in Southeast Asia.

PALCA: But this is also blood-gathered opportunistic or do they have a sharp enough proboscis to...

GAYLE: They figured they had a sharp-enough proboscis and they would stick - and they showed it drilling into the person's finger, and another time they showed it where it was like hovering on a man's lip and sticking it into the softer lip, but they still were able to get it even from the finger. It was quite unique to - what I would think of is how a moth could feed.

Dr. SCHUTT: Yeah, that's wild. I know there some moths that have sharpened a probosci they'll use to drill into fruit, but this is probably been - this behavior hasn't been known for very long, and I imagine if there are going to be some people looking into this to see if there are other blood-feeding adaptations they are like an anticoagulant. Sounds like a fascinating animal, and from the little I know, it seems that, you know, it's a creature that is in need of study.

PALCA: Well, Bill Schutt, we may have to get a ruling from NPR librarian Kee Malesky on whether it's probosci or proboscises but anyway,

GAYLE: Actually, I watched it.

PALCA: Gayle, thanks very much for your call.

GAYLE: Thank you.

PALCA: OK. Let's take another call now and go to Adam in Anchorage, Alaska. Adam, welcome to Science Friday.

ADAM (Caller): Hello, I had a question about the vampire bats and other blood-feeding creatures. Do they, sometime received diseases from the creature that they're sucking on and have those infected the bat or other blood-suckers?

PALCA: Interesting.

Dr. SCHUTT: That's a really good question. I get this question a lot about vampire bats, and sometime I hear about would these creatures - could they transmit AIDS. While blood-feeding creatures are known to transmit different bacteria and disease-causing agents, there has never been - I don't believe there has ever been a study that shows that blood taken in from a vampire bat or blood-feeding creature that was diseased blood, that that disease could then be transmitted to sort of a second host or a second victim.

These relationships between pathogenic organisms and the creatures that carry them are very complex, and they are highly evolved, and that they've taken a long time to develop. And so , it's not saying that that couldn't happen, it's just saying that at this point there - that I know of, there are no instances of where - so for example, if somebody had malaria and you had a bat withdraw blood from somebody and then bite someone else, you could transmit malaria. It's...

PALCA: No, I don't - I think there's - the malaria parasite has an interesting life cycle, and part of it depends on the - whatever the - environment is inside the mosquito gut.

Mr. SCHUTT: Yeah.

PALCA: So I don't think that's going to be - actually while we were talking, our crack editorial staff has found the link to this moth, this Asian moth that drinks blood, and we'll get that up on our website sometime in the not too distant future. So check back and you can find out exactly about this moth. But what - you started with the vampire bats, and that's obviously your research interest, but what got you into this book of other blood-sucking animals. Again, is it your childhood love of the macabre or is it - was there some other idea to understand better the evolution of blood drinking as an evolutionary process?

Mr. SCHUTT: Well, that was all part of it. I think one of the things that was a real stimulus to getting me started on this book was when I started - when I learned that there were these - that creatures that were as different as vampire bats and leeches and ticks and bedbugs all shared these common adaptations that had evolved convergently. Ah, excuse me, had evolved separately. And so you've got these - all of them share sharpened teeth and stealthy approach, and they're all real small. If you're going to feed on blood, you're going to have to do it quite often for the most part. And if you need to feed on a lot of blood, that's just going to make it more difficult.

So those connections that I've - that I saw between very, very different animals, that was one of the things that got me interested in telling the stories of some of these other blood-feeders besides vampires, things like leeches and bedbugs. And the fact that that there is so much news today built around these animals like ticks and bedbugs are having this unbelievable resurgence. So once I started to delve into the things that I didn't know a great deal about, the learning curve was really steep. It got interesting in a hurry. I just met these wonderful people. You could not write - if you're writing fiction, you could use probably some of these folks.

PALCA: Yeah, yeah.

Mr. SCHUTT: And the book just took off from there.

PALCA: That's right. Yeah. That's an excellent story. I have to tell you, by the way, we all - according to the paragon of literary virtue or chromatically usage and language here at NPR. Kim Meleski, she tells me in an email that its proboscises or proboscises. I have to - it's not clear whether the 'C' is hard or soft, but maybe I'll get another email before the show...

Mr. SCHUTT: Well, I stand corrected and see. You learned something there from that.

PALCA: Isn't that great? Isn't that - that's just what we tried to do here at National Public Radio. We give you something new to learn everyday.

Mr. SCHUTT: Well, thanks.

PALCA: But right now, we're talking about blood and blood animals with Bill Schutt. He's the author of a new book called "Dark Banquet: Blood and the Curious Lives of Blood-Feeding Creatures." I'm Joe Palca and you're listening to Talk of the Nation from NPR News. OK. Let see if we can find another call now and how about - let's talk to Michael in Cape Coral, Florida. Michael, you're in a swing state. What's on your mind?

MICHAEL (Caller): Yes. Hi. How are you doing?

PALCA: I'm great.

MICHAEL: I've been in pest control for about 14 years. I know there's a beetle in South America. I don't know the name of it. Unfortunately it's - I've lost the name of it. But I know it feeds on blood on your face and it's not the bite that's actually dangerous, but it leaves droppings on your face.

Mr. SCHUTT: Yeah. (unintelligible).

MICHAEL: If you rub that into your face, until recently, the only cure was a heart transplant.

Mr. SCHUTT: Right. That would be the assassin bug, Reduviidae.


Mr. SCHUTT: It's not actually a beetle. It's a card-carrying bug, and they're one of the creatures that - we think that might be one of the reasons that Charles Darwin had lifelong chronic illnesses when he returned from his voyage around the world, because he had gotten bit by Reduviidaes when he was in - I believed Bolivia or Ecuador.

PALCA: Really. Now, is that the same as Chagas disease? I thought that was called the kissing beetle, and that was transmitted by a beetle.

Mr. SCHUTT: Yeah. I'm not positive what the distinction is there, but - so there's probably more than one.

PALCA: Yeah.

Mr. SCHUTT: But it - the feces to me sounds like the assassin bug.

PALCA: Yeah, yeah, it could be. Interesting, interesting point. All right, let's try another call now and go to - how about Jaime in Jackson Hole, Wyoming. Jamie, welcome to the program.

JAMIE (Caller): Hi.

PALCA: Hi, Jamie.

JAMIE: How are you?

PALCA: Great.

JAMIE: I overheard that you guys were studying - this gentleman is studying the blood-sucking bats in South Americ,a and I'm from Chile in South America, and I was studying that over there in South America. They also have the chupacabra, which means 'blood-sucking goat.'

PALCA: Mm hmm.

JAMIE: And I was wondering if there's any possibility that there has been some kind of a cross high-breed with a goat, a dog, and a bat somehow because that's what these pictures look like of the strange phenomenon over there.


Mr. SCHUTT: Jamie, I think...

JAMIE: It's Halloween. I thought I'd ask you.

PALCA: Yeah, well, for Halloween it's a completely fair question. Jamie, thanks for the call. What about that goat, Schutt?

Mr. SCHUTT: Yeah. I think chupacabra means 'goat sucker,' and the implication there was that goats have been blood drawing(ph) killed. I've never heard before that chupacabras are some type of a mutant bat goat creature.

PALCA: Yeah.

Mr. SCHUTT: It's a new one for me.

PALCA: So again, I want you to talk a little bit before I let you go about the bed bugs. They - you know, what's the deal with them? They actually - they do eat blood as well and largely, our blood.

Mr. SCHUTT: Yeah. There's been a wild resurgence of these creatures. They're very well adapted to the way - to all of our habits - clutter and travel. And they are very, very difficult to get rid of once you've got an infestation. You know, I could run down - there's many new things that we do that just make it very easy for them to get into our houses. If you pick up furniture on the side of the curb and bring it in, these creatures may have - may be infesting that nice-looking bookshelf, or if you have people come over to your house to come to a party, where do you have them throw their coats when they come in?

PALCA: Right. And what - I mean, do they cause problems or they're just annoying?

Mr. SCHUTT: They're just - well, I think it just freaks people out that you're lying in bed and you're getting bitten by these things, but there are no reports of any type of disease transmitted by them, luckily.

PALCA: OK. All right. Well, Bill Schutt, we'll leave it there. I like the idea of not letting the bed bugs bite. What was the Latin name? I forget now.

Mr. SCHUTT: Cimex lectularius.

PALCA: Yeah. Don't let the Cimex lectularius bite you. Anyway, thanks very much for coming on the show.

Mr. SCHUTT: It's my pleasure. Thank you very much.

PALCA: Bill Schutt is the author of the new book "Dark Banquet: Blood and the Curious Lives of Blood-Feeding Creatures." He's also an associate professor of Biology at the C.W. Post College of Long Island University and he's a research associate at the American Museum of Natural History in New York. When we come back, we'll be talking about the intersection of science and beauty and books that exhibit both. So stay with us.

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Excerpt: 'Dark Banquet'

Bill Schutt's 'Dark Banquet'
Dark Banquet: Blood and the Curious Lives of Blood-Feeding Creatures
By Bill Schutt
Hardcover, 336 pages
List price: $25.95

Chapter 1:

(Nine years earlier)

The ceiling tiles in the abandoned icehouse had fallen long ago, transforming the floor of the cavernous building into a debris-strewn obstacle course.

"Hey, it's squishy," I said, stepping gingerly onto a slime-coated chunk just inside the doorway. "Some sort of foam."

"It's probably just asbestos."

My wife, Janet, was a terrific field assistant, but I could tell that this place was already giving her a serious case of the creeps.

"Yes, but with a protective coating of bat shit," I added, trying to cheer her up. "Let's check it out."

Wallerfield, in north-central Trinidad, had been a center for American military operations in the southern Atlantic during World War II. The land on which it had been built became part of the same Lend-Lease program that had brought Churchill's shell-shocked government fifty outdated American destroyers. Once it had been the largest and busiest air base in the world, but the English were long gone, as were the Yanks (most of them anyway), and now Wallerfield was an overgrown ruin. Row upon row of prefab buildings had either been carted off in pieces by the locals or reclaimed by the scrubby forests of Trinidad's Central Plain, but because of its cement construction the icehouse was one of the few buildings still standing. Stark white below a mantle of tangled green, the icehouse belonged to the bats—tens of thousands of them.

With help from the Trinidad's Ministry of Agriculture we'd been collecting vampire bats around the island for nearly two weeks—and things had gone incredibly well. So well, in fact, that when our friend Farouk suggested that we visit the cavernous and somewhat notorious ruins of Wallerfield, Janet and I jumped at the chance to accompany him.

The icehouse wasn't completely dark yet. Daylight streamed through a window frame that in all likelihood hadn't held glass in fifty years. The light fell obliquely onto the floor, illuminating the base of a cement pillar that rose a dozen feet to the ceiling. The only movement was from the dust that swirled into and out of the sunlight. We passed single file through a shaft of motes before continuing on into deepening shadow. The room we were crossing was huge, perhaps two hundred feet long and half as wide, and it took us a good five minutes to pick our way across the slippery rubble.

We stopped at what looked to be a high doorway leading into a smaller room, around fifteen feet square. But instead of entering, our companion put his arm out, stopping us before we could go farther.

"You don't want to walk in there, boy." The Indo-Trini accent belonged to Farouk Muradali, head of his government's Anti-Rabies Unit. Farouk would also become my mentor for all things related to Trinidadian bats and a collaborator on a project to study quadrupedal locomotion in vampire bats.

"Why's that, Farouk?" I asked, as Janet and I flicked on our headlamps.

"That is not a room," he said.

As I trained my beam inside the chamber I couldn't help noticing that the floor had a weird shine to it. "What the—?"

"It's an elevator shaft."

"A what?" Janet said, pulling up beside me.

I kicked in a small piece of debris past the threshold and it hit the dark surface with a plop. "Jesus, it's completely filled with water!"

Janet edged closer, the light from her headlamp focused at a point just beyond the doorway. "That is not water," she said.

The "floor" of the shaft was a debris-strewn swamp. There was indeed some type of filthy, tar black liquid filling the shaft, but Janet was right—it certainly wasn't water.

Scattered across the surface of this scuzzy brew were tattered blocks of dark-stained ceiling material as well as unidentifiable rubbish that had been chucked in over the past fifty years. The scariest thing to me was that all of it looked remarkably like the rubble-littered cement floor we were currently standing on.

"A group came in here to see the bats some time ago and one of them, a woman, turned up missing." Farouk pointed to a spot near where the real floor ended. "They found her there, clutching onto the ledge. Only her head and arms were above the surface."

I could see my wife give a shudder and she took several steps back from the edge.

Carefully, I moved a bit closer, kneeling at the entrance of the shaft. It still looked like a solid surface. "Farouk. How deep is this friggin' thing?"

"It goes down several floors," he said, a bit too matter-of-factly. "And off the main shaft — a maze of side tunnels."

As the light from my headlamp moved across the glistening surface, something the size of a football catapulted itself through the beam. My reflexes send me backward onto my butt as the object landed with a loud splash. Three headlamp beams hit the impact point, but by then whatever it was had disappeared below the ink black sludge.

"What the hell was that?" Janet asked, her voice an alarmed whisper.

"I think it was a toad," I responded. "A big mother." And as I turned back to Farouk, he nodded in agreement.

"They feed on the bats that fall in from above," he said. "The babies and the weak ones."

With that, the Trinidadian directed his light upward, until we could just make out the ceiling of the elevator shaft, twenty feet from where we stood.

As I squinted into the darkness, Farouk moved away, motioning us to follow. "You can see the bats much better from upstairs."

Our companion stopped before a narrow stairway leading to the second floor. The railings had either collapsed long ago or been carted off by the locals, leaving only small circular holes in the cement. Three separate beams moved across the steps, each of us searching for any indication that the stairs might not be safe.

I was on the verge of saying something about the strong smell of ammonia when I heard Farouk's voice. His tone had grown more serious. "Janet, maybe you should remain down here."

"Yeah, that's gonna happen," I said with a laugh. My wife had recently spent three hours exploring Caura Cave, the floor of which was slick with guano and crawling with enormous roaches, all without a complaint. Only later did I learn that she had had a migraine the entire time. So it came as no shock when she politely waved off Farouk's chivalrous suggestion and began climbing the darkened stairs.

One year earlier, at a symposium on bat research, I had gotten up the courage to approach Arthur M. Greenhall, one of the world's leading authorities on vampire bats. I was in the second year of a Ph.D. program at Cornell and like many grad students I was sniffing around for a dissertation project. (Luckily, the head of my graduate committee, John Hermanson wasn't one of those guys who handed you a ready-made project, although I had to admit there were some days when I wished he had.) By this time, Greenhall was in his midseventies but he was still vibrant and inquisitive — as excited about science as anyone I had ever met.

Born and raised in New York City, he'd had a storied career. In 1933 Greenhall and Raymond Ditmars, his mentor at the New York Zoological Park, had collected the first vampire bat ever to be exhibited alive in the United States. It was a female that turned out to be pregnant, delivering a vampire bat pup several months later. The following year, the young scientist arrived in Trinidad during the height of a major rabies outbreak. He studied the deadly virus and its blood-feeding vector with local scientists and collected additional vampire bats. On his return to the United States, he found he had more specimens than his zoo could display or handle. Greenhall solved the problem by keeping twenty of the creatures in his New York City apartment for two years.

During a break between research presentations that day, I had spoken to several noted bat biologists about possible differences in behavior or anatomy between the three vampire bat genera, Desmodus, Diaemus, and Diphylla. From previous studies I had learned that Desmodus, the common vampire bat, exhibited an incredible array of unbatlike behaviors, including a spiderlike agility on the ground. Just as interesting to me was the way Desmodus initiated flight. In virtually all nonvampire bats, takeoff began with a wing beat that accelerated the animal away from the wall, ceiling, or branch from which it hung. Heavily loaded down after a blood meal, Desmodus was renowned for its ability to catapult itself into flight from the ground by doing a sort of super push-up.

"Maybe," I proposed, "the other vampire bats, Diaemus or Diphylla, did things a little differently."

"Not likely," I was told more than once. "A vampire bat is a vampire bat is a vampire bat," chanted several bat scientists. I wondered if there might be a secret handshake that went along with this information, one that I had yet to learn.

After introducing myself to Greenhall, I told him what the bat researchers had said, adding that I found their responses puzzling.

"Why's that?" the vampire maven responded. "Well, because the rule of competitive exclusion says that if similar animals are competing for the same resource, in this instance blood, then one of three things will happen. One of the animals will relocate. One of them will go extinct. Or one of them will evolve changes, reducing the competition for that resource."

"And since vampire bat genera have overlapping ranges . . . ?" Greenhall interjected, setting me up beautifully for the punch line. "They've got to be different."

The old scientist gave me a sly smile. "You're on to something, kid," he said. Then he lowered his voice. "Now get on the stick before someone else gets to it first."

It had taken me six months to "get on the stick," but by then my fellow Cornell grad students, Young-Hui Chang and Dennis Cullinane and I had followed our mentor John Bertram's lead and built a miniature version of a force platform, a device that could measure the forces applied to a flat metal plate as a creature (in this case, a vampire bat) moved across it. By synchronizing the force platform signals with high-speed cinematography, we planned to see if there would be measurable differences in the flight-initiating jumps of Desmodus rotundus and Diaemus youngi, the two vampires I would collect and bring back from Trinidad.

Not long after arriving in Trinidad and Tobago's capital, Port of Spain, I told Farouk what a pain it had been for us to machine the metal components of our force platform, get the electronics working just right, and then write the data-acquisition software. He stood by patiently as I tooted my own horn, polished it a bit, then tooted some more. Finally, I ran out of intricate gear to describe (or it might have been air).

"It won't work," Farouk said, matter-of-factly.

"Excuse me?" I replied, my voice cracking like a twelve-year- old boy's.

"Your experiment won't work."

Now I was getting visibly annoyed. Hadn't I just told him how much time, effort, and brainpower had gone into this project?

"Of course it'll work." I was getting frantic now.

The Trinidadian said nothing.

"Why won't it work?"

Muradali put his hand on my shoulder and smiled. "Because Diaemus youngi doesn't jump."

"Oh," I replied, sheepishly. "Right."

The light from Janet's headlamp swept upward from the bottom of the empty elevator shaft (now below us) to the ceiling. "So where are all the --" Her beam had stopped tracking abruptly.

Illuminated at the top of the chamber were three circular clusters, each composed of a dozen or so black silhouettes, arranged concentrically. They hung silently, reminding me of giant Christmas tree ornaments. Suddenly, one of the fusiform shapes unfurled, revealing wings nearly two feet across.

"Phyllostomus hastatus," Farouk whispered. "The second-largest bat in Trinidad."

"Crawling mother of Waldo," I muttered, and Muradali threw me a confused look.

"Don't mind him," Janet explained, keeping her light trained on the bats. "He gets all scientific when he's excited."

Muradali nodded politely, then began assembling an object that looked suspiciously like a drawstring-equipped butterfly net at the end of a four-foot pole.

I shot him a quizzical look. "A butterfly net?"

"Swoop net," Muradali corrected, handing it to Janet.

Farouk nodded toward the net, then shined his light up at a cluster of bats. "To catch the ones closest to the elevator door, you lean out over the edge while someone holds your belt or backpack."

Janet glanced up at the bats, then quickly shoved the net into my hands. Possibly she'd had the same vision that I'd just had, of tumbling down a concrete-lined abyss with nothing except years of rainwater, bat guano, and asbestos to soften the fall.

As I moved into the doorway, it was impossible to chase away the image of that poor woman, stepping off the solid concrete floor and into a bottomless pit of bat-shit soup. "Thanks, hon," I said.

Janet only smiled.

"We'll leave these bats alone," Muradali said, moving away from the shaft.

As we quickly followed him, I let out a breath I hadn't realized I'd been holding. "Can we catch vampires like this?" I asked, suddenly feeling a bit braver and taking a few swings at some phantom air bats.

"No," he replied, picking his way through the debris. "Too smart."

Later, the scientist explained that early efforts to eradicate vampire bats had resulted in the deaths of thousands of non-blood-feeding species. In 1941 Captain Lloyd Gates was placed in charge of protecting the American forces stationed at Wallerfield from the twin threat of mosquitoes and vampire bats. Gates's less-than-subtle response to the bat problem was to have his men use dynamite and poison gas in caves known to contain bat roosts. Flamethrowers became a popular alternative, but still the vampires persisted, as did their attacks upon the encroaching military men. Also hard hit was the increasing population of locals who had been drawn to the region for the income the base provided. As a result, thousands upon thousands of non-blood-feeding bats were blown up, poisoned, or incinerated. Even worse, these bat eradication techniques were apparently so appealing that over eight thousand caves in post-World War II Brazil were similarly destroyed.

Farouk recounted how he and vampire bat expert Rexford Lord had been sent to Brazil to pick up some tips on eradicating Desmodus from the antirabies groups working there.

"These guys took us to a cave. Then they rolled out a big tank of propane and wired it up with an old-fashioned camera flash, running the wires out the cave entrance."

He described how everyone waited outside the cave entrance while one of the Brazilians opened up the gas-tank valve.

"Must have been the new guy," I added.

Excerpted from Dark Banquet: Blood and the Curious Lives of Blood-Feeding Creatures by Bill Schutt Copyright © 2008 by Bill Schutt. Excerpted by permission of Harmony, a division of Random House, Inc. All rights reserved.

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