Later signs and symptoms may include: 1  Fever. 2  Headache. 3  Nausea. Vomiting. 4  Agitation. Anxiety. 5  Confusion. Hyperactivity.  Difficulty 1  swallowing. Excessive salivation.  Fear of water (hydrophobia) because of the difficulty in 1  swallowing. Hallucinations.  Insomnia. Partial paralysis.
Some people consider the caterpillars of this butterfly to be a pest, since they eat parsley, carrots, and other garden plants. Many people enjoy butterfly-watching and collecting, and the Eastern Black Swallowtail is considered by most to be a handsome specimen.he Eastern Black Swallowtail is a common swallowtail butterfly, often confused with the Pipevine Swallowtail or female Tiger Swallowtail. Both male and female Eastern Black Swallowtails are bluish-black with yellow spots on the wings.
Eastern Swallowtail egg on Dill Weed. First, locate the eggs. The tiny yellow spheres perch prominently on the leaves of dill, fennel, parsley and rue. Check your plants frequently, as wasps, ladybugs, spiders and others will slurp up these protein pops as soon as they are spotted.