The pys backed away； but only a foot or two。 They weren't afraid。 They seemed to know he couldn't hurt them。
Angrily； Hammond tore a branch from a tree and swiped at them with it。 The pys dodged； nipped at the leaves； squeaked happily。 They seemed to think he was playing a game。
He thought again about the poison。 He remembered that one of the animal handlers had been bitten by a py in a cage。 The handler had said the poison was like a narcotic…peaceful； dreamy。 No pain。
You just wanted to go to sleep。
The hell with that； he thought。 Hammond picked up a rock； aimed carefully； and threw it； striking one py flat in the chest。 The little animal shrieked in alarm as it was knocked backward； and rolled over its tail。 The other animals immediately backed away。
Better。
Hammond turned away； and started to climb the hill once more。 Holding branches in both hands； he hopped on his left leg； feeling the ache in his thigh。 He had not gone more than ten feet when one of the pys jumped onto his back。 He flung his arms wildly； knocking the animal away； but lost his balance and slid back down the hillside。 As he came to a stop； a second py sprang forward； and took a tiny nip from his hand。 He looked with horror； seeing the blood flow over his fingers。 He turned and began to scramble up the hillside again。
Another py lumped onto his shoulder； and he felt a brief pain as it bit the back of his neck。 He shrieked and smacked the animal away。 He turned to face the animals； breathing hard； and they stood all around him； hopping up and down and cocking their heads； watching him。 From the bite on his neck； he felt warmth flow through his shoulders； down his spine。
Lying on his back on the hillside； he began to feel strangely relaxed； detached from himself。 But he realized that nothing was wrong。 No error had been made。 Malcolm was quite incorrect in his analysis。 Hammond lay very still； as still as a child in its crib； and he felt wonderfully peaceful。 When the next py came up and bit his ankle； he made only a halfhearted effort to kick it away。 The little animals edged closer。 Soon they were chattering all around him； like excited birds。 He raised his head as another py jumped onto his chest； the animal surprisingly light and delicate。 Hammond felt only a slight pain； very slight； as the py bent to chew his neck。
The Beach
Chasing the dinosaurs； following the curves and slopes of concrete； Grant suddenly burst out through a cavernous opening； and found himself standing on the beach； looking at the Pacific Ocean。 All around him； the young velociraptors were scampering and kicking in the sand。 But； one by one； the animals moved back into the shade of the palm trees at the edge of the mangrove swamp； and there they stood； lined up in their peculiar fashion； watching the ocean。 They stared fixedly to the south。
〃I don't get it；〃 Gennaro said。
〃I don't； either；〃 Grant said； 〃except that they clearly don't like the sun。〃 It wasn't very sunny on the beach； a light mist blew； and the ocean was hazy。 But why had they suddenly left the nest？ What had brought the entire colony to the beach？
Gennaro flipped up the dial on his watch； and looked at the way the animals were standing。 〃Northeast…soutbwest。 Same as before。〃
Behind the beach； deeper in the woods； they heard the hum of the electric fence。 〃At least we know how they get outside the fence；〃 Ellie said。
Then they heard the throb of marine diesels； and through the mist they saw a ship appearing in the south。 A large freighter； it slowly moved north。
〃So that's why they came out？〃 Gennaro said。
Grant nodded。 〃They must have heard it ing；〃
As the freighter passed； all the animals watched it； standing silent except for the occasional chirp or squeak。 Grant was struck by the coordination of their behavior； the way they moved and acted as a group。 But perhaps it was not really so mysterious。 In his mind； he reviewed the sequence of events that had begun in the cave。
First the infants had been agitated。 Then the adults had noticed。 And finally all the animals had stampeded to the beach。 That sequence seemed to imply that the younger animals； with keener bearing； had detected the boat first。 Then the adults had led the troop out onto the beach。 And as Grant looked； he saw that the adults were in charge now。 There was a clear spatial organization along the beach； and as the animals settled down； it was not loose and shifting； the way it had been inside。 Rather； it was quite regular； almost regimented。 The adults were spaced every ten yards or so； each adult surrounded by a cluster of infants。 The juveniles were positioned between； and slightly ahead of； the adults。
But Grant also saw that all the adults were not equal。 There was a female with a distinctive stripe along her head； and she was in the very center of the group as it ranged along the beach。 That same female had stayed in the center of the nesting area； too。 He guessed that； like certain monkey troops； the raptors were organized around a matriarchal pecking order； and that this striped animal was the alpha female of the colony。 The males； he saw； were arranged defensively at the perimeter of the group。
But unlike monkeys； which were loosely and flexibly organized； the dinosaurs settled into a rigid arrangement…almost a military formation； it seemed。 Then； too； there was the oddity of the northeast…southwest spatial orientation。 That was beyond Grant。 But； in another sense； he was not surprised。 Paleontologists had been digging up bones for so long that they had forgotten how little information could be gleaned from a skeleton。 Bones might tell you something about the gross appearance of an animal； its height and weight。 They might tell you something about how the muscles attached； and therefore something about the crude behavior of the animal during life。 They might give you clues to the few diseases that affected bone。 But a skeleton was a poor thing； really； from which to try and deduce the total behavior of an organism。
Since bones were all the paleontologists had； bones were what they used。 Like other paleontologists； Grant had bee very expert at working with bones。 And somewhere along the way； he had started to forget the unprovable possibilities…that the dinosaurs might be truly different animals； that they might possess behavior and social life organized along lines that were utterly mysterious to their later； mammalian descendants。 That； since the dinosaurs were fundamentally birds…
〃Oh； my God；〃 Grant said。
He stared at the raptors； ranged along the beach in a rigid formation； silently watching the boat。 And he suddenly understood what he was looking at。
〃Those animals；〃 Gennaro said； shaking his head； 〃they sure are desperate to escape from here。〃
〃No；〃 Grant said。 〃They don't want to escape at all。〃
〃They don't？〃
〃No；〃 Grant said。 〃They want to migrate。〃
Approaching Dark
〃Migrating！〃 Ellie said。 〃That's fantastic！〃
〃Yes；〃 Grant said。 He was grinning。
Ellie said； 〃Where do you suppose they want to go？〃
〃I don't know；〃 Grant said； and then the big helicopters burst through the fog； thundering and wheeling over the landscape； their underbellies heavy with armament。 The raptors scattered in alarm as one of the helicopters circled back； following the line of the surf； and then moved in to land on the beach。 A door was flung open and soldiers in olive uniforms came running toward them。 Grant heard the rapid babble of voices in Spanish and saw that Muldoon was already aboard with the kids。 One of the soldiers said in English； 〃Please； you will e with us。 Please； there is no time here。〃
Grant looked back at the beach where the raptors had been； but they were gone。 All the animals had vanished。 It was as if they had never existed。 The soldiers were tugging at him； and he allowed himself to be led beneath the thumping blades and climbed up through the big door。 Muldoon leaned over and shouted in Grant's ear； 〃They want us out of here now。 They're going to do it now！〃
The soldiers pushed Grant and Ellie and Gennaro into seats； and helped them clip on the harnesses。 Tim and Lex waved to him and