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caterpillars of some kind - Euchaetes egle

caterpillars of some kind - Euchaetes egle
northbrook, cook County, Illinois, USA
September 1, 2009
Size: about 3/4 to 1"
these were swarming this plant in the prairie

Moved from ID Request.

the plant
I do not recall seeing any milkweed pods on this plant but your caterpillar ID looks accurate. thaans

definitely milkweed
Leaf shape and texture matches. The plants don't get pods until later in the fall.

You can always recognize milkweed by the thick white sap that appears whenever a leaf is removed or the stem broken. It's sticky but not irritating unless you have very sensitive skin, and washes off easily.

your probably correct about t
your probably correct about this. I'll check next time back. I did see other milkweeds already with pods in another area of the prairie. Main thing is the bugs are id'ed

Milkweed Tussock Moth Caterpillar - Euchaetes egle
Looks like to me. I think that leaf is milkweed too?

click to enlarge

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