Seemingly no better place in the greater Tucson area for seeing amazing Violet-crowned Hummingbird than Tucson Audubon’s Paton Center for Hummingbirds in Patagonia, AZ. (Based on regular sightings + ease of access.)
Plus lots and lots of other hummingbirds and other birds. Following are Broad-billed Hummingbird (or mixed/unknown hummingbirds) unless otherwise noted:
Violet-crowned Hummingbird @ feeder:
Bonus Gray Hawk flying over nearby/adjacent Nature Conservancy property: