Plague Insect That Eats Everything in Its Path
Puzzle 3 of Day at the Museum Easy Pack
Question is: Plague Insect That Eats Everything in Its Path
and the answer is: LOCUST
Word Meaning:
LOCUST — Any of the grasshoppers, often polyphenic and usually swarming, in the family Acrididae that are very destructive to crops and other vegetation, especially migratory locusts (Locusta migratoria).
Definitions from Wiktionary.