"But what incentive does the tarbine have to live until the embryo kills it?"
Pyre objected. "And what about the training most young have to receive from their parents?"
Christopher's voice came on the circuit. "You're thinking of the usual insectean pattern where one species lays eggs in the body of another, which becomes the larvae's food when they hatch. But the young mojo doesn't have to kill its host.
If you look closely at the way the skin and muscle are arranged in the tarbine's back, it looks very much like the critical area could be split open and resealed with a minimum of damage and no real loss of flight capability."
"Assuming the mojo doesn't exceed a maximum size," Telek added. "And as to post-natal instruction, the mojo's brain seems to have a larger proportion of the high-neural-density 'primary programming' structure than earthstock or
Aventinian animals I've studied. That's an assumption, of course; Qasaman biochemistry doesn't have to be strictly analogous to ours-"
"And you fried part of the brain shooting the thing down-" Christopher put in.
"Shut up, Bil. Anyway, it looks very possibly like the mojo young can simply poke through the tarbine's skin, fly its separate way and take up housekeeping in the forest."
"Or on somebody's shoulder," Pyre frowned as a sudden thought struck him. "On somebody's shoulder... the same way the tarbines ride bololins?"
"So you noticed the similarity, did you?" Christopher commented. "What makes it even more intriguing is that the tarbines have the same organic hypo organ the mojos do."
"As do the bololins themselves," Telek added, "though God only knows what species they use as embryo-hosts. Maybe each other; the top of the size chain has to do something different."
" 'Big fleas have little fleas upon their backs to bite 'em,' " Pyre quoted the old saying.
" '-and little fleas have lesser fleas, and so ad infinitum,' " Telek finished for him. "You're the third person who's brought that up tonight. Starting with me."
"Um. Well... the contact team still going sightseeing tomorrow?"
"Yes. I think I'll clue them in on all this as soon as they wake up-maybe Yuri will be able to worm out some more information from Moff." Telek paused and Pyre could hear, faintly, the sound of a jaw-cracking yawn. "You'd better get under cover and get some sleep, Almo," she said. "I think under the circumstances you can skip that riverside fauna survey we talked about yesterday-I've got enough data to keep me busy for quite a while."
"No argument," Pyre agreed. "I'll call in when I wake up."
"Just be careful you're not seen. Good night-or morning."
"Same to you." Shutting down the laser comm, Pyre spent a few moments rearranging its camouflage and hiding his other equipment. A dozen meters away was his shelter tree; tall and thick, its lowest branches a good five meters above the ground. A servo-powered jump took him the necessary height, and a few branches higher he reached his "shelter," a waterproof one-man hammock bag slung under a particularly strong branch and surrounded by a glued-stick cage sort of arrangement. It made Pyre feel a little strange to sleep inside such a barrier, but it was the simplest way to make sure no carnivore could sneak up on him, no matter how quiet it was or how deeply asleep he was.
Entering, he sealed the cage and worked himself into the hammock with a sigh.
For a minute he considered setting his alarm, ultimately decided against it. If anything came up, the Dewdrop had one-way communication with him via his emergency earphone, and if they were careful how they focused the beam, it was unlikely even a snooper set in the airport control tower could pick it up.
The control tower. His drift toward sleep slowed as he remembered the men who'd charged out of that dark and supposedly deserted building for bololin target practice. Certainly their presence didn't mesh with the building's assumed main function-no aircraft had so much as shown its nose since the Dewdrop's arrival.
But if they weren't in there to handle planes, then what were they doing there?
Monitoring the visitors' ship? Probably. Still, as long as they were just watching they weren't likely to bother anyone.
Closing his eyes, Pyre put the image of silent watchers out of his mind and slid into oblivion.
Chapter 13
For the drive to the outer villages Moff exchanged their usual open-air car for a small enclosed bus. The reason wasn't hard to figure out; barely a kilometer out of Sollas the road began passing in and out of the patches of forest that had been visible from orbit. "Just a normal precaution," Moff explained about their vehicle at one point. "Cars are rarely attacked, even by krisjaws, but it does happen occasionally." Joshua shuddered a bit at the thought, wondering for the hundredth time what had possessed Pyre to go out into the forest alone-and what had possessed Telek to let him go. The Dewdrop had been maddeningly uninformative on everything dealing with Pyre's mission; and Joshua, for one, found it uncomfortably suspicious. He and Justin had discussed in some length the mystery behind Pyre's presence here during the trip from Aventine, though without finding any good answers. The possibility that Telek might have brought
Pyre along solely because his political view made him expendable wasn't one that had occurred to Joshua before; but it was occurring to him now, and he didn't care for it at all.
But for the moment, at least, it was a low-priority worry. Pyre had demonstrated his ability to survive the Qasaman wilderness... and, besides, the biological breakthrough he and Telek had made last night was just too fascinating to ignore. Joshua's schooling had included only a bare minimum of the life sciences, but even he could see how radically different the Qasaman ecology was from anything known either in the Worlds or the Dominion and could guess at some of the implications. The contact team hadn't had a safe chance to discuss it among themselves yet, of course-as far as their hosts knew, they should have no inkling of any of this. But Joshua could see the same thoughts and speculations in their eyes. Watching the brightly colored foliage outside the bus, he waited impatiently for Cerenkov to start the gentle probing Telek had suggested.
Cerenkov's grip on his curiosity was apparently stronger than Joshua's, however, and he waited until the fifty-kilometer trip was nearly over before nudging the conversation in that direction. "I've noticed a fair sprinkling of smaller birds flying among the trees," he said, gesturing toward the window beside him, "but nothing that seems to be the size of the mojo or its female form of tarbine. Do they nest in trees in the wild, or do they raise their young in those quill forests on the bololins' backs?"
"There is no need of nests or the raising of young," Moff told him. "A mojo's young are born with all the necessary survival skills already present."
"Really? Doesn't the tarbine at least have to nest long enough to hatch the eggs?"
"There are no eggs-mojo young are born live. In this sense most of the bird-like
Qasaman creatures are not true birds, by the old standards."
"Ah." Joshua could almost see Cerenkov casting about for a question that wouldn't reveal that he knew Moff was being deliberately misleading. "I'm also interested in the relationship between the tarbines and bololins. Is the tarbine merely a parasite, getting a free ride but not contributing anything?"
"No, the relationship is more equal than that. The tarbines often help defend their bololins against predator attack, and it's thought that they also help locate good grazing sites from the air."
"I thought the bololins liked to travel along magnetic field lines," Rynstadt put in. "Can they just get off that path any time they want to go foraging?"
Moff gave him an odd look. "Of course. They only use the magnetic lines as a guide to and from the northern breeding areas. How did you deduce the mechanism?"
"The layout of Sollas was the major clue," Cerenkov replied before Rynstadt could do so. "Those wide avenues all point along the field lines, with no real provision for bololin herds going any other direction. I think Marck's question refers to the fact that when the herd we saw was coming through the city the people stood just barely inside the cross streets, as if they knew the bololins wouldn't stray even slightly their path. One of those still aboard the ship had wondered whether they were actually constrained to follow their individual lines pretty closely."