Esodo 10:15

For they covered the face of the whole earth, so that the land was darkened; and they did eat every herb of the land, and all the fruit of the trees which the hail had left: and there remained not any green thing in the trees, or in the herbs of the field, through all the land of Egypt.

Ver. 15. So that the land was darkened.] So many of them flying together, as a cloud. The like was seen in Poland and Silesia in 1575 and 1542. a

a Bucholc., Chronol.