Dilly swallowtail caterpillar blog header by Beth Saunders | Jul 16, 2020 | 0 comments A swallowtail caterpillar, which is hellow with black spots, does a backbend on a sprig of fennel. Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ