Healy,
The global decline of honey bees has not affected Tucson yet. If it does, the saguaro cactus does not need bees for pollination. White-winged doves and nectar-feeding Leptonycteris bats are just as effective.
Reference:
http://libraryportals.org/PCDL/research/8/The region around Tucson, Arizona is thought to host more kinds of bees than anywhere else in the world. There are at least 45 genera in 7 families, and perhaps as many as 1000 species of bees distributed within the Sonoran Desert bioregion.
Sonoran Desert genera:
Agapostemon, Andrena, Anthidium, Anthophora, Ashmeadiella, Bombus, Centris, Coelioxys, Colletes, Diadasia, Epeolus, Exomalopsis, Halictus, Heteranthidium, Hylaeus, Megachile, Melecta, Melissodes, Nomadopsis, Nomia, Osmia, Panurginus, Peponapis, Perdita, Psithyrus, Sphecodes, Stelis, Svastra, Tetralonia, Triepeolus, Xenoglossa, Xenoglossodes, Xeromelecta, Xylocopa
Reference:
http://www.desertmuseum.org/books/nhsd_bees.phpRecently a new bee, that looks like
Apis mellifera (honey bee) except for being long and having black wings, has been visiting our bird bath. Not a new species as I first thought, it is
Apis dorsata (Giant Honey Bee).
Reference:
http://en.wikipedia.org/wiki/File:Gaint ... is_dorsata)_on_Tribulus_terrestris_W_IMG_1020.jpg
Link in above reference does not work. Try this one:
Giant Honey BeePossible solution for your apple and peach trees--set up an apiary. You can mail order bees for it.
Reference:
http://outdoorplace.org/beekeeping/citybees.htm