In studying the skies for 3 years i have narrowed it down to the times when YOU will be able to see one. It
seems that they come when the energy is right,.When the fault lines are in alignment with the sun.  
During the equinox they are gone, but about a week later they will return. The rock carvings with light
and shadow tells us when the doors are open and closed.   You must have a open mind and LOTS OF
PATIENCE. But i have found when the  " HOT " times are. I hope one day you will see one and i hope this
chart will help you.  If you live next to a mountain with petroglyph's on it chances are that one day you will
see a " UFO " by that mountain. Make sure you have a camera and some witnesses  that always helps :)   
BEST OF LUCK TO YOU AND IF YOU SEE ONE PLEASE LET ME KNOW  :)
astronomy-related rock
art sites on south mountain
Locality
Interactions
Designs
Central avenue
look out sight
summer solstice sunset
outline cross
chandler
boulevard/
19th way
summer solstice sunrise
large lizard
chandler
boulevard /
32nd street
arrow site
summer and winter solstice sunset
sun disk, swastika
desert vista/ lizard
monolith site
winter solstice sunset
lizard
goodman
canyon/saddle site
winter solstice sunset
outlined cross
hieroglyphic
canyon/sunstone site
winter solstice sunset
sun disk
hieroglyphic spring
summer solstice sunrise
geometric
mormon trail
lizard site
summer solstice sunrise
lizard
trail antropomorphh
summer solstice sunrise
anthropomorph
spit dome site
summer solstice sunrise
geometric
pima canyon/
lizard site
summer solstice sunrise
large lizard
summit trail/
whirling whorl site
winter solstice sunrise
anthropomorph,
whorl spiral
twin buttes
four pillars site
long line sun disk
sungod site
summer and winter solstice sunrise
bird
24th street/
morning star site
summer soltice sunrise
snake with diamond tail
32nd street/  
phoenix lights
phoenix lights panel
formation of sighting
diamond site
winter soltice sunrise
spiral and
quadruped/supernatral
animal
sun disk site
summer solstice sunrise
diamond with legs
" rake " panel
summer solstice zenith
rake other life forms
anthropomorph
people
summer solstice sunrise
anthropomorph people
36th street/
lizardman site
equinox
lizard with headdress
barbell person panal
summer solstice sunrise
barbell human
waterbird site
waterbird
winter solstice sunset
UFOs THAT
YOU WILL SEE
light and shadow
Where the hot spots are
THERE ARE MANY DIFFERENT LIFE FORMS IN THIS
MOUNTAIN,  THEY LIKE TO TAKE THE SHAPE OF
ANIMALS, HUMANS, ORBS, " T " CROSSES, SNAKES, AND
LIGHTS. THE ROCK ART TELLS US WHEN THEY WILL BE
HERE AND WHAT TO LOOK FOR
HOW I WAS ABLE TO
TRACK THE SUN
FROM MY WINDOW