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.
1 If you have the space, consider planting a butterfly garden. 2  Fill the bed with plants caterpillars love to eat, such as dill, milkweed, willow and sunflowers. 3  Add plants that butterflies enjoy, including red clover, verbena and lantana. 4  The butterfly garden will keep caterpillars away from other desirable plants.. Invite birds and predatory insects into your garden. Hang a bird feeder to attract birds to the area. Ducks and chickens also enjoy eating caterpillars. If your garden lacks predatory insects, such as praying mantises, you can usually purchase a box of them from a garden center.