The park is also home to more than 130 species of birds including white-throated swifts, swallows and canyon wrens.

And always, the twitter of swallows and white-throated swifts, who make the cliff their home.

White-throated swifts, cliff swallows, canyon wrens and bumblebees of prodigious size also sailed past.

During the summer, White-throated Swifts (Aeronautes saxatalis) nest in the top of the arch.

Like all swifts, White-throated Swifts use their short legs only for clinging onto vertical surfaces or wires, and never land on the ground voluntarily.

Golden Eagles, Red-tailed Hawks, Peregrine Falcons, and White-throated Swifts can be seen in the area.

One popular tour goes to an enormous dwelling called Cliff Palace, a west-facing alcove with 150 rooms where white-throated swifts dart by tourists clicking away on digital cameras.

During the summer, White-throated Swifts (Aeronautes saxatalis) nest in the top of the arch.

The White-throated Swift (Aeronautes saxatalis) is a swift of the family Apodidae native to western North America, south to cordilleran western Honduras.