
Cactus wren (Campylorhynchus brunneicapillus), building a nest in chainfruit cholla (Opuntia fulgida), at the Desert Botanical Garden, Phoenix, Arizona.

Cactus wren (Campylorhynchus brunneicapillus), building a nest in chainfruit cholla (Opuntia fulgida), at the Desert Botanical Garden, Phoenix, Arizona.

Cactus wren (Campylorhynchus brunneicapillus), building a nest in chainfruit cholla (Opuntia fulgida), at the Desert Botanical Garden, Phoenix, Arizona.

Helix.

Helix.

Spine Series, No. 6.
Chainfruit cholla (Cylindropuntia fulgida), at Park of the Canals, Mesa, Arizona.
Spine Series, No. 6.
Chainfruit cholla (Cylindropuntia fulgida), at Park of the Canals, Mesa, Arizona.

Spine Series, No. 1.
Chainfruit cholla (Cylindropuntia fulgida), at Park of the Canals, Mesa, Arizona.
Spine Series, No. 1.
Chainfruit cholla (Cylindropuntia fulgida), at Park of the Canals, Mesa, Arizona.

Jumping cholla (Cylindropuntia fulgida). This plant is also called chainfruit cholla.
At Lost Dutchman State Park, Pinal County, Arizona.
Jumping cholla (Cylindropuntia fulgida). This plant is also called chainfruit cholla.
At Lost Dutchman State Park, Pinal County, Arizona.