"Good boy," Amy said to the whale. She hit the lap timer button on her watch.

Nate cut the engine and the speedboat settled into the gentle swell. He threw the hydrophone overboard, then hit the record button on the recorder that was bungee-corded to the console. Amy set the camera on the seat in front of the console, then snatched their notebook out of a waterproof pouch.

"He's right on sixteen minutes," Amy said, checking the time and recording it in the notebook. She wrote the time and the frame numbers of the film she had just shot. Nate read her the footage number off the recorder, then the longitude and latitude from the portable GPS (global positioning system) device. She put down the notebook, and they listened. They weren't right on top of the whale as they had been before, but they could hear him singing through the recorder's speaker. Nate put on the headphones and sat back to listen.

That's how field research was. Moments of frantic activity followed by long periods of waiting. (Nate's first ex-wife had once commented that their sex life could be described in exactly the same way, but that was after they had separated, and she was just being snotty.) Actually, the wait here in Maui wasn't bad — ten, fifteen minutes at a throw. When he'd been studying right whales in the North Atlantic, Nate had sometimes waited weeks before he found a whale to study. Usually he liked to use the downtime (literally, the time the whale was down) to think about how he should've gotten a real job, one where you made real money and had weekends off, or at least gotten into a branch of the field where the results of his work were more palpable, like sinking whaling ships — a pirate. You know, security.

Today Nate was actively trying not to watch Amy put on sunscreen. Amy was a snowflake in the land of the tanned. Most whale researchers spent a great deal of time outdoors, at sea. They were, for the most part, an intrepid, outdoorsy bunch who wore wind- and sunburn like battle scars, and there were few who didn't sport a semipermanent sunglasses raccoon tan and sun-bleached hair or a scaly bald spot.