Owl Butterfly Caterpillars from Brazil

Subject:  Are these venomous?
Geographic location of the bug:  Sao Paulo, Brazil
Date: 08/16/2019
Time: 10:09 PM EDT
Your letter to the bugman :  Are these stinging caterpillars or slugs?
How you want your letter signed:  Danirl

Owl Butterfly Caterpillars

Dear Danirl,
These caterpillars are not venomous and they do not sting.  They are some species of Owl Butterfly Caterpillars from the genus
Caligo based on this CanStock Photo image and this Alamy image.  You can find some good information on Insetologia.

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