Observations in native, non-spinescent vegetation include the following: an active nest, 3.0 meters above ground, in a 5.0 meter tall desert willow (Chilopsis linearis) in Portal, Cochise County, Arizona, on 16 April 1991; a nest, 2.7 meters above ground, in a 3.2 meter tall Mormon tea (Ephedra trifurca) in the Florida Mountains, south of Deming, Luna County, New Mexico, on 10 March 1993; three nests (one of which contained a female incubating two eggs), 2.1-3.6 meters above ground, in the inflorescence of 2.6-4.1 meter tall soaptree yuccas (Yucca elata) on the
San Andres National Wildlife Refuge, Dona Ana County, New Mexico, on 28 July 1993.