It is put on the falcons head too cover his eyes. This in fact can be a fore shadow of the mother murdering Marion in the shower.
It is also a good bedding source. This way of attracting the falcon back is called the tilwah. The beak is yellowish-grey, the eye brown to dark brown, and the feet off-white. One of the most characteristic features of the Aquila audax is its long, wedge like tail1, 3, 5, 7.
As the old saying goes, first the hawk, then the horse, then the hounds, then, and only then, the humble falconer.
Also, increased urbanization has led to a loss of habitat in many parts of New Mexico not only for birds of prey but also for their quarry.