In the fourth plague in Egypt, God filled the land of Egypt with flies. What is the significance of these flies? From Exodus 8:20-32 this article explains the significance of the plague of flies.

In the third plague in Egypt, God filled the land of Egypt with gnats. What is the significance of this plague? From Exodus 8:16-19 this article explains the significance of the gnats’ plague. 

This article on Exodus 8:1-15 is about the second plague and the Egyptian fertility goddess.