Black Swallowtail Caterpillar

Mystery caterpillar
July 6, 2010
This caterpillar has been nibbling my parsley. That’s actually a good thing because I planted it in hopes of attracting Black Swallowtail Larvae. The question is, is that what I have here? I have not found a photo that’s exactly like this guy. The blue doesn’t seem correct for a Black Swallowtail. What do you think?
Chapel Hill, North Carolina

Black Swallowtail Caterpillar

Dear Flatpickr,
Congratulations.  Your efforts to plant parsley to attract Black Swallowtail Caterpillars has been successful.  Your caterpillar is in fact a Black Swallowtail.

Photo of author


BugMan aka Daniel Marlos has been identifying bugs since 1999. is his passion project and it has helped millions of readers identify the bug that has been bugging them for over two decades. You can reach out to him through our Contact Page.

4 thoughts on “Black Swallowtail Caterpillar”

  1. It would appear that I’m not the only one who plants parsley in the hopes of attracting black swallowtail butterflies. My family seems to think I’m a little loopy to do this, but now I know I’m not alone!

  2. What do they look for when they are ready to pupate? I move monarch pupas all the time so we can watch them hatch in the house. I suppose I could do the same thing in my 30 degree garage.
    What is the normal pupation time for this swallow tail.


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