With a clownish skip of his black, scaly feet, and a show-offish swerve of his dusty ebon wings, Kaw took to the air once more. Upward he soared, his white-lidded eyes directed again toward the ground, seeking something interesting to occupy his attention and energies.
Thus, presently, he saw a brownish puff that looked like smoke or dust in the gully beside the ruined blue tower at the pinnacle of which he and his mate were wont to build their nest in summer. Sound came then-a dull, ringing pop. The dusty cloud expanded swiftly upward, widening and thinning until its opacity was dissipated into the clearness of the atmosphere.
Kaw was really startled. That this was so was evinced by the fact that he did not voice his harsh, rasping cry, as he would have done had a lesser occurrence caught his attention. He turned back at first, and began to retreat, his mind recognizing only one possibility in what had occurred. Only the Itorloo, the Children of Men, as far as he knew, could produce explosions like that. And the Itorloo were cruel and dangerous.
However, Kaw did not go far in his withdrawal. Presently-since there were no further alarming developments- he was circling back toward the source of the cloud and the noise. But for many minutes he kept what he considered a safe distance, the while he tried to determine the nature of the strange, bulging, grayish-green thing down there in the gully.
A closer approach, he decided finally, was best made from the ground. And so he descended, alighting several hundred yards distant from the narrow pocket in the desert.
Thence he proceeded to walk cautiously forward, taking advantage of the cover of the rocks and dunes, his feathers gleaming with a dusty rainbow sheen, his large head bobbing with the motion of his advance like any fowl's. His manner was part laughably ludicrous, part scared, and part determined.
And then, peering from behind a large boulder, he saw what he had come to see. It was a bulging, slightly flattened sphere, perhaps a yard across. Prom it projected flat, oval things of a gray-green color, like the leaves of a cactus. And from these, in turn, grew clublike protuberances of a hard, horny texture-spore-pods. One of them was blasted open, doubtless by the pressure of gas accumulated within it. These spore-pods were probably not as complexly or powerfully designed as those used by the parent growths on Mars, for they were intended for a simpler purpose. The entire plant bristled with sharp spines, and was furred with slender hairs, gleaming like little silver wires.
Around the growth, thousands of ant bodies lay dead, and from its vicinity other thousands of living were retreating. Kaw eyed these evidences critically, guessing with wits as keen as those of a man of old their sinister significance. He knew, too, that presently other spore-pods would burst with loud, disturbing noises.
Kaw felt a twinge of dread. Evolution, working through a process of natural selection-and, in these times of hardship and pitiless competition, putting a premium on intelligence- had given to his kind a brain power far transcending that of his ancestors. He could observe, and could interpret his observations with the same practical comprehension which a primitive human being might display. But, like those primitives, he had developed, too, a capacity to feel superstitious awe.
That gray-green thing of mystery had a fantastic cast which failed to identify it with-well-with naturalness. Kaw was no botanist, certainly; still he could recognize the object as a plant of some kind. But those little, bright, eye-lenses suggested an unimaginable scrutiny. And those spines, silvery in sheen, suggested ghoulish animation, the existence of which Kaw could sense as a nameless and menacing unease.
He could guess, then, or imagine-or even know, perhaps-that here was an intruder who might well make itself felt with far-reaching consequences in the future. Kaw was aware of the simple fact that most of the vegetation he was acquainted with grew from seeds or the equivalent. And he was capable of concluding that this flattened spheroid reproduced itself in a manner not markedly unfamiliar. That is, if one was to accept the evidence of the spore-pods. Billions of spores, scattering with the wind! What would be the result?
Kaw would not have been so troubled, were it not for those crumpled thousands of ant bodies, and the enigma of their death. It was clear that the ants had come to feed on the invader-but they had perished. How? By some virulent plant poison, perhaps?
The conclusions which intelligence provides can produce fear where fear would otherwise be impossible. Kaw's impulse was to seek safety in instant departure, but horror and curiosity fascinated him. Another deeper, more reasoned urge commanded him. When a man smells smoke in his house at night, he does not run away; he investigates. And so it was with Kaw.
He hopped forward cautiously toward the invader. A foot from its rough, curving side he halted. There, warily, as if about to attack a poisonous lizard, he steeled himself. Lightly and swiftly his beak shot forward. It touched the tip of a sharp spine.
The result left Kaw dazed. It was as though he had received a stunning blow on the head, A tingling, constricting sensation shot through his body, and he was down, flopping in the dust.
Electricity. Kaw had never heard of such a thing. Electricity generated chemically in the form of the invader, by a process analogous to that by which, in dim antiquity, it had been generated in the bodies of electric eels and other similar creatures.
However, there was a broad difference here between the subject and the analogy. Electric eels had never understood the nature of their power, for they were as unresponsible for it as they were unresponsible for the shape of the flesh in which they had been cast. The spore plant, on the other hand, comprehended minutely. Its electric organs had been minutely preplanned and conceived before one living cell of their structure had been caused to grow on another. And these organs were not inherited, but were designed to meet the more immediate needs of self-protection. During the winter, the invader, studying its surroundings, had guessed well.
Slowly Kaw's brain cleared. He heard an ominous buzzing, and knew that it issued from the plant. But what he did not know was that, like the electric organs, the thing's vocal equipment was invented for possible use in its new environment. For days, since the coming of spring, the invader had been listening to sounds of various kinds, and had recognized their importance on Earth.
Now Kaw had but one thought, and that was to get away. Still dazed and groggy, he leaped into the air. From behind him, in his hurried departure, he heard a dull plop. More billions of spores, mixing with the wind, to be borne far and wide.
But now, out of his excitement, Kaw drew a reasoned and fairly definite purpose. He had a fair idea of what he was going to do, even though the course of action he had in mind might involve him with the greatest of his enemies. Yet, when it came to a choice, he would take the known in preference to the unknown.
He soared upward toward the bright blue of the heavens. The porcelain tower, the ant hills, and the low mounds which marked the entrances to the rodent colonies slipped swiftly behind. As if the whole drab landscape were made to move on an endless belt.
Kaw was looking for his mate, and for the thirty-odd, black-winged individuals who formed his tribe. Singly and in small groups, he contacted and collected them. Loud, raucous cries, each with a definite verbal meaning, were exchanged. Menace was on the Earth-bizarre, nameless menace. Excitement grew to fever pitch.
Dusk, beautiful and soft and forbidding, found the bird clan assembled in a chamber high-placed in a tremendous edifice many miles from where Kaw had made his discovery. The building belonged to the same gentle culture which had produced the blue porcelain tower. The floor of the chamber was doubtless richly mosaicked. But these were relics of departed splendor now thickly masked with dust and filth.