Adult male Dobsonfly:

(Edit: They're harmless. The females have much shorter mandibles capable of pinching humans, but they're anyways
not aggressive. The males live for about 3 days as an adult and the females up to a week longer. They live for several
years as predatory, aquatic larvae, at which stage they're known as hellgrammites and are popular as bait.)
Adult probably-male beetle of the genus Phengodidae:
