It was outside my house in Southern California.
While at rest, the wing span appeared to be ~3-4 inches

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It was outside my house in Southern California.
While at rest, the wing span appeared to be ~3-4 inches

Hello it looks like the Big Poplar Sphinx we have on the East Coast. I don't know its range... So take a look at Pachysphinx modesta.
Cheers,
Michel
Quebec, Canada
-----
Michel Pilon
Naturalist-photographer
Quebec, Canada
Mes Parcours Nature
parcours.pilonm.org
The western species is P. occidentalis-----Don
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