'Flies' in the Bible

He sent divers sorts of flies among them, which devoured them; and frogs, which destroyed them.

You will not fear the terror of the night,the arrow that flies by day,

He spake, and there came divers sorts of flies, and lice in all their coasts.

The wicked person sees this and flies into a rage; his teeth gnash and wear away. The desire of the wicked will amount to nothing.