Final answer:
The insect in the picture is a giant ichneumon wasp, which is a shy and harmless insect. It is a parasitoid that injects eggs into other insects, so it is not poisonous to humans.
Step-by-step explanation:
The insect in the picture is a giant ichneumon wasp (genus Megarhyssa). These wasps are some of the biggest North American wasps, with females having a long ovipositor that is longer than their own body. While they may look fierce, they are actually shy and harmless, as they are parasitoids. Their larvae develop as parasites inside the body of other insects, and the female's ovipositor is used to inject eggs into the host. Therefore, they are not poisonous or dangerous to humans.