Saturniid moth (no common name), Polythysana rubrescens, Hemileucinae, found in Chile

Photo 1 by nitsuga74, 2 by piolo, 3 by uxi_bp, 4 by alexandra_castaneda, 5 by aricafoix, and 6 by niccolocantarutti

I couldn’t find a photo of a caterpillar with ID confirmed to this exact species, but here’s one from the same genus, so it would likely look similar!

The spines are most likely venomous! Photo by leotempesta