I spotted this strange looking caterpillar recently while exploring Jackson Miles Abbott Wetland Refuge. I was intrigued by all of the tufted spines sticking out of its back—I am pretty sure that it is upside down in this photo. Over the years, I have learned that it is best to avoid spiny caterpillars, because many of them are poisonous.
I sent a copy of a photo of this caterpillar to the helpful folks at bugguide.net and one of the viewers there suggested that this is an Eastern Buck Moth caterpillar (Hemileuca maia). I have not yet been able to get a confirmed identification, but according to Wikipedia, the caterpillars of this species are, “covered in hollow spines that are attached to a poison sac. The poison can cause symptoms ranging from itching and burning sensations to nausea.”
Fortunately I kept my distance when I captured this image with my long macro lens. I have no desire for a close encounter with a spiny caterpillar.
© Michael Q. Powell. All rights reserved.
Mike Powell 
Now that is cool !!!
Benjamin is fascinated with this caterpillar that carries poison! After reading the edited post to him and enlarging the photo, Benjamin had his nose close to the screen intently examining. He decided that the poison sacs are the “bulge” at the base of the spines. “Wow, that is so awesome! I never heard of a caterpillar carrying poison. Mommy always tells me to look but don’t touch. Good thing you didn’t touch!” Thank-you, Mr. Mike!!
It certainly looks well-armed!
Very ‘sharp’ photo in every sense of the word 🙂 Love it!
I get your point. 🙂
Hahaha! 🙂
Neat photo🙂
Ouch! Glad you kept your distance!