Albert Barnes Commentary Judges 6:5

"For they came up with their cattle and their tents; they came in as locusts for multitude; both they and their camels were without number: and they came into the land to destroy it." — Judges 6:5 (ASV)

Grasshoppers - Rather locusts (compare Exodus 10:4-6, Exodus 10:14–15; Joel 1:0; Joel 2:0; Psalms 78:46).