Answer: caterpillars

AnswerCrossword Clue
caterpillarsA vehicle with such tracks
caterpillars(in general use) Any similar larva of various insects, esp. sawflies
caterpillarsAn articulated steel band passing around the wheels of a vehicle for travel on rough ground
caterpillarsCATERPILLAR, the elongated wormlike larva of a butterfly or moth
caterpillarsThe larva of a butterfly or moth, having a segmented wormlike body with three pairs of true legs and several pairs of leglike appendages. Caterpillars may be hairy, have warning coloration, or be colored to resemble their surroundings