The canyon community knew before Pascal had to call a formal assembly. Word traveled the way it always did in Sunspire — through the network of animals who moved along the same trails, who rested in the same shade pockets, who passed each other at the same territorial boundaries each day.
By the time Pascal and Kira returned to the main canyon floor and found a central rock ledge to speak from, seven tortoises, a pair of collared lizards, a Gila woodpecker who used the canyon walls for nesting, and approximately twenty assorted smaller lizards were already gathered in the sparse shade of a desert willow at the canyon's widest point.
Pascal gave them the information directly. No softening, no hedging. The surface pools were dropping.
The spring entrance was blocked by a sidewinder nest. The north seep was down to a third of its normal output. He did not know how long the seep would hold at any level.
He did not know when — or whether — the main water table would recover. He did know that the community needed to move at least some of its most vulnerable members to the secondary canyon system to the northeast, where there was a partially shaded basin that collected dew runoff from the upper plateau and held it for several weeks after the last rain.
The secondary canyon was two miles away across open desert. Two miles in full summer heat, over open sand and gravel flats, was not a trivial journey for desert tortoises. He told them this too.
The oldest tortoise in the group — a male named Gram whose shell carried the accumulated scratch patterns of forty years on Sunspire rock — spoke first.
"When do we move?" he asked.
Not whether. When. Pascal had expected resistance.
He had prepared arguments. He did not need them.
"Tomorrow at first light," Pascal said.
"Before the heat builds."
The journey planning was straightforward in theory and complicated in practice. Pascal and Kira would scout the route that afternoon, marking the usable shade pockets and identifying any potential predator positions along the open desert crossing. The main group would follow the next morning at the pace of the slowest tortoise.
Pascal would travel the route three times — once ahead of the group as advance scout, once alongside the group to manage route adjustments, and once at the rear to check that no stragglers were left behind on open ground. The afternoon scout was the part that concerned him most. The open desert crossing between Sunspire Canyon and the secondary basin had no cover.
It was a flat gravel pan, approximately three hundred feet wide, where the only shade was provided by scattered creosote bushes that offered minimal real protection from a hawk working the thermal column above. Every other route was longer, adding distance that the tortoises could not cover before the heat built to dangerous levels. The gravel pan it was.
Pascal and Kira made the crossing together in late afternoon, when the hawk that usually worked the thermals above the pan had typically moved to hunting the canyon rim rather than the flat desert below. The crossing took sixteen minutes at a moving pace. Pascal counted his steps and noted the position of each usable creosote for the next morning's crossing.
Seven bushes. The longest gap between adjacent bushes was ninety feet of completely open ground. A tortoise could not cross ninety feet of open ground in time to avoid a diving hawk if the hawk was positioned and committed.
Pascal looked up. The hawk was there. It was not working the thermals above the pan — it was moving along the canyon rim, which was correct for this time of day.
But it was lower than expected. He had a decision to make. He could abort the scout and return to the canyon, delaying the plan by a day.
Or he could continue the crossing and use himself as the decoy if the hawk repositioned. He continued. The hawk repositioned.
It caught a thermal rising from the warmer dark rock of the canyon floor and climbed in a slow spiral, positioning itself above the pan rather than the rim. Pascal was in the open section between the fourth and fifth creosote bushes when the hawk locked its gaze on the pan surface and began its assessment glide. He stopped.
He shifted. The gravel pan was a specific mixture of pale tan gravel, darker iron-stained pebbles, and sparse mineral-crusted patches. He had studied it on the approach.
He rendered the full surface pattern across his body — the pale tan base, the random dark pebble stippling, the occasional white mineral patch. He went flat. Maximum contact with the ground.
Maximum surface coverage. The hawk made two low passes. On the second pass it was close enough that Pascal could see the individual barring on its chest feathers.
It did not strike. It climbed and repositioned back toward the canyon rim. Pascal remained flat for three more minutes, then continued to the fifth creosote, the sixth, and across the final open stretch to the secondary basin edge.
He noted the position of the hawk's return thermal. Tomorrow, with twenty animals in the open, that hawk would be a problem that required active management. He and Kira returned to Sunspire as the last light left the canyon floor.
He had a plan.