It is probably a Sphingidae. Or Sphinx Moth.
The Sphinx are medium to large insects. They have long, beautifully streamlined forewings, short but slender triangular hind wings and elongated bodies. The antennae are slightly thickened in the middle or toward the tip. These moths are strong fliers. Most are active at dusk. Most of them feed much like hummingbirds, hovering in front of a flower and extending their proboscis into it. Some have very long proboscis and drink nectar from the throats of long-necked flowers. Mostly found in their native Honduras, but could have easily been carried into California on the backs of Honduran illegal immigrants.
Now, I'm no entomologist, but I did stay at a Holiday Inn Express last night.
