Caterpillar Oleander Hawk-moth Daphnis Nerii On The Rock Worm. Insect. Animal. Royalty-Free Stock Photo

Caterpillars have soft bodies that can grow rapidly between moults. Their size varies between species and instars from as small as 1 millimetre up to 14 centimetres. Some larvae of the order Hymenoptera ants, bees, and wasps can appear like the caterpillars of the Lepidoptera. Such larvae are mainly seen in the sawfly suborder. However while these larvae superficially resemble caterpillars, they can be distinguished by the presence of prolegs on every abdominal segment, an absence of crochets or hooks on the prolegs these are present on lepidopteran caterpillars, one pair of prominent ocelli on the head capsule, and an absence of the upside-down Y-shaped suture on the front of the head.