Rhipicephalus sanguineus
Nogales, Santa Cruz County, Arizona
Coordinates: 31.335348, -110.937918
Elevation: 3,932 ft
August 12, 2018
Size: 9 mm (not including capitulum)
Found attached to a Chihuahua dog
Determined by Salvador Vitanza
Confirmed by Tyler Hedlund and TickEncounter.org, which replied saying: “”Oh yikes! You have encountered an adult female brown dog tick (Rhipicephalus sanguineus). This one looks like it was attached and feeding for about five days.”