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.
They eat insects, seeds and fruits and are one of the few birds capable of eating toxic monarch butterflies. They come to feeders for sunflower seeds. Their black head, cinnamon body and black wings with white wing patches distinguish this species. Again, the females suggest a large, chunky sparrow.