The Greek noun akris refers to the locust — a devastating migratory insect that was both a dreaded plague and a recognized food source in the ancient Near East. Locusts appear throughout Scripture as instruments of divine judgment, and in Mark 1:6 as part of John the Baptist's wilderness diet.
The locust carries a double significance in Scripture. As an instrument of judgment, it represents the most devastating natural force known to the ancient world — the eighth plague of Egypt (Exodus 10:4-19) and the subject of Joel's apocalyptic vision (Joel 1-2) are the greatest expressions. Joel's 'army of locusts' became the template for apocalyptic judgment and is echoed in Revelation 9, where demonic beings 'like locusts' are released from the abyss. Yet the locust is also food: John the Baptist ate locusts and wild honey (Matthew 3:4; Mark 1:6) in his wilderness sojourn, a detail that connects him to Elijah and the prophetic tradition of radical simplicity. The same creature that symbolizes devastation sustained the prophet who prepared the way for the Lord.