The peregrine falcon was blinded with a leather hood topped by a stiff white bristle of pronghorn antelope hair. The bird sat still and upright, secured to the falconer’s hand by thin leather jesses tied to its talons and looped through his gloved fingers. The falcon, Nate thought, was still and regal and hungry-tightly packed natural explosives encased by feathers, just waiting for a fuse to be lit.

Although slightly less than twenty-four inches tall, the female he held, once released, was the fastest species on the planet, capable of speeds during its hunting dive of more than two hundred miles an hour. When it balled its talons and struck a bird in flight with that velocity, the result was a concussive explosion of blood, bones, and feathers that still took Nate’s breath away.

The falcon, like all his raptors over the years, had no name. And every time he released one to hunt there was a chance she would fly away and simply never return.

He slowed his pace and listened as he approached the wall of willows. Through the brush was a shallow, spring-fed pond not more than three acres across. It was hard to see from the ground but was obvious from the air, and it was the only substantial body of water for miles around except for the river itself. Therefore, it attracted passing waterfowl. And when the breeze shifted he could hear them: the rhythmic, almost subsonic clucking of paddling ducks. The peregrine heard them, too, and responded with an instinctive tightening of her talons on his hand.

Nate raised the bird so he could whisper directly into her hood, “They’re here.”

Nate was tall and ropy, with long limbs and icy blue eyes set in a hawklike wind-burned face. The hair he’d cut and dyed months before was growing back long and blond but hadn’t reached its customary ponytail length. He wore stained camo cargo pants, laced outfitter boots, a faded U.S. Air Force Academy hooded sweatshirt, and a thick canvas Carhartt vest. Strapped to his rib cage on his left side, between the sweatshirt and the vest, was a scoped five-shot. 500 Wyoming Express revolver. A three-inch braid of jet-black human hair was attached to the thick muzzle by a leather string.