Xestia caterpillars are generally stout and cryptically colored; in some species they have quite prominent dark lengthwise spots, but may e.g. be entirely green or whatever else gives best camouflage.
Caterpillars of the Xestia genus are generally stout and well-camouflaged. Some species feature prominent dark stripes along their bodies, while others blend in with their surroundings by being green or another color that helps them hide.