White Lined Sphinx Moth
http://en.wikipedia.org/wiki/Hyles_lineata
Pink Spotted Hawk Moth
http://en.wikipedia.org/wiki/Agrius_cingulata
Hummingbird moths do look to be near the size of hummingbirds, and resemble them remarkably while hovering above there favorite food, but on silent wings that do not hum.
Even their wings appear to be made of feathers. A special gift here in my zone 8b South Louisiana yard in late summer and fall, they feed near or after sunset, and are highly attracted to White Hedychium (butterfly) Ginger.
The humming bird moth insists, that no one's garden is left without_ beauty in alluring complexity_ the man need not look for splendor, but paradise will seek the man.
http://en.wikipedia.org/wiki/Hedychium_coronarium