The veteran watchman had never been drunk or stoned on the job. And the sighting corroborated what Lieutenant Kilar of the ESU had dutifully noted in his report on the subway killings: that bat expert Dr. Nancy Joyce of the Bronx Zoo believed there might be “an abnormally large specimen” of bat inhabiting the NewYork subway system.

“I’m having trouble signing onto this,” Weeks said. “But people are dying and I’ve got to explore every possible lead. You can have your chopper.”

Weeks told Joyce that he needed his helicopters for reconnaissance and transportation. His office would arrange with the police commissioner to have an ESU helicopter pick her up at the pier in fifteen minutes. The OEM director had only two requests: that she stay in constant radio communication with his assistant, Marius Pace, and that she not fuck up.

Joyce promised.

She kept the binoculars and grabbed her camera. Gentry went with her to the pier to wait. He had only one request: that she come back safely.

Joyce promised.

Ten minutes later, she and two ESU fliers were airborne in an Aviation Unit Bell-412.

Twenty-Eight

In all her years of bat hunting, Nancy Joyce had never had the opportunity to ride in a helicopter. Within five seconds of lifting off from the pier, she realized she’d have been happy to postpone the experience indefinitely.

The chopper ascended, which wasn’t the same as taking off. Not to her. As it arced steeply from the pier, the sense of motion up and away and then forward was pronounced. It was like being in a bumper car that had suddenly added a third dimension of mobility.

But that wasn’t all. The helicopter was incredibly loud. Even though Joyce was in the seat directly behind the pilot, she would have had to yell if she wanted to converse. Fortunately, as soon as they were airborne, the copilot handed back a headset. It fit entirely over her ears. That not only deadened the clapping-loud drone of the rotors, it enabled Joyce to communicate with the fliers and Mr. Pace without shouting.

The chopper was also fast. Joyce was accustomed to cabs picking and weaving their way through New York traffic. The helicopter was above the bats and just about ten blocks away before she even had a chance to adjust the mouthpiece of the headset and sit back.

All of that went through her mind in moments. She forced herself to concentrate on the horizon. On the bats.

The pilot said, “Dr. Joyce, all I was told is that you want to observe the bats. You’re going to have to tell us from what height and where.”

“I want to be able to watch the river facing north,” she said. “How high are we now?”

“Seventeen hundred feet.”

“How high would you say the bats are?”

“Maybe six hundred feet. Six fifty tops.”

“Does your propeller cause any kind of downdraft?”

“It does,” he said. “If we get on top of the bats and go much lower than above twelve hundred feet, we’re gonna stir them up like a blender.”

“Then make it twelve hundred feet,” she said. “But the bats might ascend. If they do, we should be ready to get out of their way.”

“Understood.”

“Dr. Joyce?” said a voice with a gentle British accent. “This is Marius Pace.”

“Hi,” she said. “Sorry. I didn’t mean to ignore you.”

“You didn’t,”he assured her. “You were busy. Gordon advises me that what you’re watching for is a very large bat.”

“That’s correct.”

“How large is large?”

“I’m not sure,” she said.

“Eagle? Condor?” he asked.

“More like a Cessna,” she replied.

“You mean as in the private airplane?”

“Yes.”

Pace said,“ That’s large, all right. And if and when you see this bat, is it your intention to pursue?”

“Only to watch where it’s going,” she replied. “If possible, I want to get close enough to see what it looks like, take some pictures.”

“I understand,” Pace said. “All right, then. From now on I’ll just be listening in. If you need anything, ask.”

She looked out as the helicopter reached the shifting carpet of bats. They were bottom-lit, twenty or thirty thousand of them swimming back and forth on a bright and luminous sea. It was majestic, mesmerizing, and inexplicable. Worse, she didn’t know exactly where it was all going. If and when one of the big bats arrived, would these smaller bats go or stay? And if they stayed, would they stay peaceably?

Joyce hadn’t really thought about the personal danger until now. If these bats became territorial like the others, things could get very bad. She also realized, suddenly and belatedly, that when she took off Gentry had really been worried about her. Joyce hadn’t had anyone except her assistant feel that way for a long time. It felt nice.

Joyce wondered what Professor Lowery was making of all this. He would have a perfect view of the river from his apartment window. She also wondered what the bats were making of them. What they might be thinking, feeling. They’d be picking up the movement of every bat, every bird, every insect, the choppers, the people. The input had to be overwhelming.

“Can you hover?” Joyce asked the pilot.

He said he could.

The helicopter stopped moving forward.

As Joyce looked down on the thick mesh of bats, anticipation grew. Behind the helicopter, the dark cloud had spread southward almost down to Forty-second Street. To the west, the bats had reached nearly to the New Jersey shore. State police helicopters were already hovering over the New Jersey Palisades. Bats were still joining the group from all directions.

And then she saw something. Something large just beyond the bats.

She raised the binoculars, and the pilot nudged the nose of the chopper to the northwest to give her a better view. The George Washington Bridge was hidden save for an occasional glint of light.

“Go down!” she said suddenly.

“Where?” the pilot asked.

“Underneath the bats.”

“You mean through them-”

“No. Go around-anywhere. I need to get under the bats. Something’s out there, flying low. It’s going to come in under the bats.”

The chopper swung to the east, toward Manhattan. It moved so fast that if Joyce hadn’t been wearing her seat belt she’d have been thrown against the door. The pilot dropped them lower as Joyce sat back up and watched through the binoculars.

“Where to now?” the pilot asked as they fell below the bat line.

“Stay about one hundred feet up. Go north slowly.”

The pilot did. They passed through the Eighties. The Nineties. Joyce looked ahead. Something was there. It had ducked under the canopy of bats and was moving slowly. She unbuckled her seat belt for a better look.

“There it is!” she said excitedly. “Mr. Pace? Tell Mr. Weeks we found it! We found it and it’shuge.”

The bat was still beyond the range of the searchlights, but she knew it was there because she could make out its outline as it moved forward, blocking the shore light and headlights behind it.

And of course it was flying low. New Paltz was far, and there were no thermal currents from the sun to heat the air and help lift the bat. There was no reason for it to tire itself out by flying high.

As the bat neared, as it began to pick up the light, Joyce could see that itwas enormous. There was nothing to compare it to but the other bats, and it dwarfed them. The wingspan looked to be about ten-to-twelve feet across-at this distance, in the dark, it was still difficult to tell. The body was thick, like a long barrel, with lumpy masses on the back. Joyce assumed they were muscle. The head was wide and pie-round. She couldn’t quite make out the ears, though they were nearly as high as the head was long, and they were extremely close together.There was a large bulge near the back of the bat, on the bottom. Joyce assumed they were the legs.