The Falcon solicites the Tiercel by assuming a horizontal head low posture on a copulation perch.
The Tiercel flys in and prepares to mount.
The Falcon sleeks feathers, crouches and leans forward and may move her tail up and to the side. He Chitters and while she gives a Copulatory Wail. It is pretty loud.
During copulation, the female is at an angle of 45 degrees with wings slightly lifted and extended, sometime tail partly spread.
The Tiercel maintains an upright position throughout copulation by flapping wings high above his body and balancing on his tarsi with closed toes and feet turned inward.
The Tiercel dismounts after 9 seconds of copulation.