Subject:  Caterpillar ID
Geographic location of the bug:  SW North America (AZ desert)
Date: 09/28/2021
Time: 12:11 PM EDT
Your letter to the bugman:  We found this Sept, 27 early evening in New River, AZ (2,000 ft elevation).  I have not found anything like it in my searches.  The shiny silver barbs on its back come out when agitated.
How you want your letter signed:  DC

Possibly Hubbard’s Small Silkmoth Caterpillar

Dear DC,
This is a Silkmoth Caterpillar in the genus
Syssphinx, possibly a Hubbard’s Small Silkmoth Caterpillar.  Here is a BugGuide image for comparison.

Location: Arizona

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