Is the black-tailed ship moth poisonous?

No. According to the inquired data, it belongs to arthropods, Insecta, Lepidoptera, Notopterygiaceae and Cynomorium songaricum. It is found that it likes to eat longan leaves in larval stage and parasitizes on longan and sumac, so it does not accumulate toxins in its body, and its bright body is because of its warning color to the external environment, so as to confuse predators and dare not eat it as food. It has phototaxis, dark brown head and antennae, about 23~37mm in length and 70~89mm in wing spread, which is of medium height among moths.